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AT_T SOA Experience_savings


  • pg 1
									     AT&T SOA Experience
     Rich Erickson
     Enterprise SOA Practice Lead

Copyright © 2006 AT&T. All rights Reserved.
 Session Overview
 Motivation For SOA
 Context and Terminology
 SOA Foundation and Fundamental Decision Points
 AT&T SOA Journey and Progress

Page 2            Copyright © 2006 AT&T. All rights Reserved.
Motivation For SOA
    Traditional Interface Development
    Different project teams create similar interface functionality
    on the same systems in the same release cycles.
      Project 1 - Software                                  Parallel                              Project 2 - Software
   Development Process Steps                                 teams                             Development Process Steps
1. Determine conceptual solution                                                            1. Determine conceptual solution
   including necessary system interfaces         Project architects                            including necessary system interfaces
2. Concept Gate approval without con-              specify project-                         2. Concept Gate approval without con-
   sideration of target interfaces or reuse      specific interfaces                           sideration of target interfaces or reuse
3. Prepare Business Reqs with high                without trying to                         3. Prepare Business Reqs with high
   level description of interfaces               reuse/extend what                             level description of interfaces
                                                 exists nor create a
4. Reqs Gate approval with no consider-                                                     4. Reqs Gate approval with no consider-
                                                 desired target API
   ation of interface target or reuse                                                          ation of interface target or reuse
5. Prepare Tier3 Requirements & IAs                                                         5. Prepare Tier3 Requirements & IAs
6. Commit Gate approval without con-             Project teams work                         6. Commit Gate approval without con-
   sideration of interface target or reuse       independently with                            sideration of interface target or reuse
7. Prepare Software Design                        little collaboration                      7. Prepare Software Design
8. Design Gate approval without con-
                                                    cross-team and                          8. Design Gate approval without con-
   sideration of interface target or reuse         end up deploying                            sideration of interface target or reuse
                                                    similar interface
9. Implement, Test and Deploy                         functionality                         9. Implement, Test and Deploy
                                                                                               Note: Interfaces
                                                                                            designed in the fire of
                                                                                             project urgency are
                                                                                            usually not reusable in
     Page 4                                   Copyright © 2006 AT&T. All rights Reserved.     different contexts
   Impact of a SOA Development Process
   SOA cuts interface cost, complexity and time to market
                                                                    Sys1                                    Sys2
                                         Project 1                                   Sys3
                                                                                                                       Project 2
 Stops development,                                                                              Sys5
test & maintenance of                                                                                                               Reduces total
 new versions of the                                                                                                                complexity by
    same interface                                                                   Sys6                                          constraining the
 functionality across                                                                                                            growth of interfaces
   different projects                                                        Project 3
                                                                                                                                     per system

                   Traditional Approach                                                      With SOA Development Process
                                   Release- Dev                                                                        Release-
                    Project Interfaces                                                                  Project Interfaces      Dev
                                   Relevant                                                                            Relevant
                New Extended Reused Total*   $                                                      New Extended Reused Total    $
    Sys1          4           1             0             7         675K                Sys1           2           1         2        5    475K
    Sys2          2           1             0             4         375K                Sys2           1           1         1        3    275K
    Sys3          4           0             0             6         600K                Sys3           2           0         2        4    400K
    Sys4          2           0             0             2         300K                Sys4           2           0         0        2    300K
    Sys5          1           0             0             1         150K                Sys5           1           0         0        1    150K
    Sys6          1           0             0             1         150K                S6s6           1           0         0        1    150K
    * Includes relevant interfaces that could have been reused    2250K                                                                   1200K
            Benefits increase over                                                         Cuts development cost
             time as the library of                                                        through interface reuse
   Page 5       services grows                                Copyright © 2006 AT&T. All rights Reserved.
                       SOA Case Study
                       By 2005 AT&T had documented over $40 million in savings
                       from SOA, as in this example of a system that accrued $2.6
                       million in 2 years by reusing one service across 5 clients.
                                                                                                                    • Reuse of a single service
$ Cumulative Savings

                                                                                                                      saved 50%-85% of the cost
                       2.1M                                                                                           of building custom interfaces.
                                                                                                                    • Savings will continue to
                                                                                                                      accumulate as more clients
                       1.6M                                                                                           are added.
                                                                                                                    • Maintenance costs will be
                                                                                  Client                              lower (not shown) because
                       1.1M                                                         5                                 fewer interfaces need to be
                                                                   Client                                             versioned and maintained.
                                                      Client                                                        • Operational efficiencies
                                                        3                                                             will be higher (not shown)
                                                                                                                      because of increased
                                  Service                                                                             consistency across SOA
                                                                                                                      customer/client interfaces.
                                2003                                                                         2005

                       Page 6                                  Copyright © 2006 AT&T. All rights Reserved.
SOA Value to AT&T
The SOA benefit model was recast and zeroed out in 2005.
It projects additional savings in excess of $100M by 2009.
                   Projected Cumulative SOA ROI
                                                                                         SOA Benefit Model:
                        Cumulative SOA ROI             ROI w/o SOA                       • Service reuse contributes
                                                                                           an average 50% reduction
    250%                                                                                   in integration cost.
    200%                                                                                 • Includes engineering
    150%                                                                                   efficiencies from use of
                                                                                           standards, models and
    100%                                                                                   repositories.
     50%                                                                                 • Includes development
      0%                                                                                   efficiencies from use of
        2005             2006            2007               2008                2009       standard integration toolkits
                                                                                         • Without SOA costs and
                                                     $ Represent Cum Net Savings           complexity continue to
Key Assumptions:
 Constant annual development budget spend at 2005 levels.
 Rate of re-use of existing services is approximately 3 times per service during a 10 year period.
  − Note: The system on the previous slide provided 5 instances of reuse within 2 years
 SOA adoption rate grows from 25% of projects in 2006 to 90% of projects by 2009.
 Average overhead to create SOA services for the first time is 10% over the current costs.
 Cost of a new interface is $(att proprietary) on average.

Page 7                                     Copyright © 2006 AT&T. All rights Reserved.
Context and Terminology

Page 8      Copyright © 2006 AT&T. All rights Reserved.
The Challenge of Realignment
SOA is a ‘Realignment’ challenge rather than a ‘Turnaround’
or ‘Startup’ challenge.
•   Realignments challenge established cultural
    norms that hamper high performance.
    –    Realignments are important to business success.
•   But in realignments, the situation is not dire,
    leading many to feel change is not necessary.
    –    So realignment advocacy is like farming: cultivating awareness of the
         need for change, influencing opinion leaders, keeping the pressure on.
•   Unlike startups or turnarounds, the impact of
    realignment is not always appreciated.
    –    If abandoned, most will not know what could have been.
•   Major realignments like SOA need strong executive
    support to overcome inertia and resistance.

Page 9                         Copyright © 2006 AT&T. All rights Reserved.
 AT&T Definition of SOA                                                                    Governance

Different definitions of SOA abound                                         Target
along with a lot of misinformation.                                                          Design

                                                  To support SOA:
                                                      A foundation of middleware,
                                                      taxonomy and naming standards
  “SOA” is an approach to                             must be put in place.
  architecture & solution
  design which:                                       Target architects & lead engineers
                                                      must functionally decompose their
  • Requires architects and                           enterprise domains & applications
    engineers to itemize the                          into a set of highly reusable target
    services they are creating,                       services, which solution designers
    extending or reusing in their                     can reference in their designs and
    requirements documents.                           build out over time.
  • Brings governance to the
    treatment and selection of                           A common misconception is to
    these services as they flow                         equate SOA with Web Services or
    through the software                               integration technologies like ESBs.
    development lifecycle.

Page 10                       Copyright © 2006 AT&T. All rights Reserved.
   SOA Actors
  A SOA program needs to successfully engage five teams.
STRATEGIC SOA                Standards & Tools: Middle-                              TACTICAL SOA
                            ware, SOA, Naming, Taxonomy

 Target Architecture:                                                         Solution Realization:
 Target Systems and                                                             Project Feature
   Functional APIs                                                               Development

    Specifies target                                                             Builds production
 capabilities to be built                                                     capabilities referencing
  out over time; works                                                          the target; specifies
 with project teams to                                                        SOA service impacts in
     resolve issues                                                               solution designs

                                Governance: Project
                                Management & SDLC

  Page 11                       Copyright © 2006 AT&T. All rights Reserved.
  Strategic and Tactical Aspects
  SOA has both strategic and tactical aspects resting on a
  foundation of enterprise standards.
                   Contributor                     Output               Puzzle Analogy

                     Project              Specification of          Each solution team
Tactical Aspect      Solution             SOA service               assembles a few pieces;
of SOA              Designers             impacts in                over time they assemble
                                          solution designs          the whole puzzle.

Strategic Aspect     Target               The „To Be‟ view          Definition of the puzzle
of SOA              Architects            of functional             to be built out over time,
                                          capabilities by           including the shape of
                                          domain                    each piece.
Foundation of       Technical             Interoperability          Puzzle piece
SOA                 Architects            standards, SOA            requirements and
                    and SOA               tools and                 governance of the
                     Support              governance                assembly process.

  Page 12             Copyright © 2006 AT&T. All rights Reserved.
     SOA Foundation and
     Fundamental Decision Points

Copyright © 2006 AT&T. All rights Reserved.
                      Strategic SOA: Target Services
                      Strategic SOA is tasked with functionally decomposing
                      the architecture into a set of abstract target services.
                            Sales                                                         Sales
                                                                                                                                                                                                                                               Decomposition starts by dividing
Management                     OM
                                                                                                         FrameOrder[New|Change|Delete]                                                     FrameProvisionProvider[New|Change|Delete]           the architecture into domains.
                                                                                                        PM               GenericEventListener.notify
                                                                                                                                                                                                                                         OM    Working top-down, domain teams
Management                                       PM                                        Sales
                                                                                                                                                                                                                                               define the target services they will

                                                                                                                                                                                                                                               provide to other domains.
                                                                                                                                                                                                                                                 − Domains expectations must be
Provisioning                                                                                                                                                                                       CSI[Query|Insert|Update|Delete]
  Factory                                            ProvPM               FulfillSys                                                                                                               NAI[Query|Insert|Update|Delete]
 Services                                                                                                                                                                                 InvSys

                                                                                                                                                                                           FrameProvisionProvider[New|Change|Delete]               vetted cross-team.
                                                                                                                                                                                                                                                 − Service functionality is described
 Data                                                                                                                                                                                      FrameNumberPortability[New|Change|Delete]

                                                                                                                                                                             Provide        InvSys
                                                                                                                                                                                                                                                   abstractly without regard to pro-
           Contract                                                                                                                                                         Account
                               t   #)
                                                 ct D
                                                           )                                                                   (Acc   ount #, C
                                                                                                                                               o Name)                      Hierarchy
                                                                                                                                                                                                                                                   tocol or implementation details.

                                                                                                                                                                                                                                               The hard work is the mental
       Solution                                      Premise
                                                                                                                          (Account #’s) ( Svc Type, Loc, etc)                             Provide
                                                                                                                                                                                                                                               analysis that must be performed.
                                                                                                                                    ( Dates,Availability

                                                                                                                                                                                                                                                 − Modeling tools can help docu-
                                            Routers                                                                                                                                      Availability
                                                                                         Activity                            (AcctK
                                                                                                                                   ey#, L
OM                                                                                                                (Serv                   oc, Sv
                                                                                                                        ice/Ne                   c, Serv
                                  t                                                                                            twork                     ice ID
        Orchestrate             ac n                                                                                                 Inven                     )
                            ntr atio
                          Co ent
                                                                                                                                          tory)                                          Provide InvSys
                                                                                                                                                                                                                                                   ment decisions but are not
            on                                                          tat                                                         et d
                                                                      rS                           (Price)

                                                                                                                                             il  s))
                                                                                                                                                                                                                                                   essential to the actual analysis.
                                                                           Contract ID
                                             n  Id                                                                           (SolutionData)


                                                                                                                                                                                                                                               Service definitions must extend to
          Order                                                        Store
                                                                                                                                                                                                                                               the data flowing in/out of opera-
                                                                                                                                                                                                                                               tions or the target won‟t be stable
          Activity                                                    Contract                                                               Solution
                                                                       Data InvSys                                                            Data
                                                                                                              on Solution

                                                                                                                                                                                                                                               or usable.

                   Page 14                                                                                                                                                                       Copyright © 2006 AT&T. All rights Reserved.
 Data Standardization
SOA APIs express an implicit data model, which ideally
should be identified to increase the comprehensibility &
consistency of service definitions.
                                                                        Enterprise Data Models
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Target Object Requirements:
                                             Product Catalog (PSOC)                                                                                                                                                                                                                           Customer (CCI & eCRM)
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Technology for modeling and
                  -Status : int
                  -Crea teD ate

                  -Effe ctiveDate : Date
                  -CostRate : Date

                                                                                                              -Status : int
                                                                                                              -EffectiveD ate : D ate
                                                                                                              -End Date : Date
                                                                                                              -Cre ateD ate


                                                                                                                                                                                            1 ..*
                                                                                                                                                                                                                                                                                                            C amp aign
                                                                                                                                                                                                                                                                                                         -C a mpa ig nId
                                                                                                                                                                                                                                                                                                                                                                A T& T A uthoriz ed Ag ent
                                                                                                                                                                                                                                                                                                                                                                - Agen tId


                                                                                                                                                                                                                                                                                                                                                                                                                 - May re sult in
                                                                                                                                                                                                                                                                                                                                                                                                         -Sig ns for AT & T

                                                                                                                                                                                                                                                                                                                                                                                                                                0 ..*
                                                                                                                                                                                                                                                                                                                                                                                                                                                      C ontrac t
                                                                                                                                                                                                                                                                                                                                                                                                                                                   -C ontractId

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1                     0..*
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   C ont ract A u thoriz ation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  - Co ntra ctAu thId
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            describing objects
                                                                                                                                                                                                                                                                                                                                                                                                                                                    1 ..*                                              1

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Standards for reuse and
                           1          -Cost to provide                                  *                                                                                                                                                                                                                                                                                                                                                                    *
              *                                                                                                                                                                                                                                                                                                 1                                                                                                       1                                                                                            *                     *
                                                Product Bundle                                                                            Payment Ter ms                                                                                                                                                                                                         Order/LocationInstructions                                                                                                                0..*
                                                                          Component                                                     -Payme ntTermKey                                      Price Plan                                  Proposal Option                  0..*
                      Product                                                                                                                                                  1..*                                                                                                                                                                              -ActivityId
                                                                 -Produ ctComponen tKey                                                 -Statu s : int                                   -Pa ymentTermKey
          *                                   0..* 1..*                                            *                                    -EffectiveDate : Date           1..*    1..*                                              1..*                                                                                                                           -CustomerSiteId                                   Customer Location                                                            Customer Site
              -Produ ctKey                                       -Status : int                                                                                                                                                                                                                                                                                   -Instructions
              -Sta tus : in t                                                                                                           -EndD ate : D ate                                                                                                                                                       *   * -is part of                                                                                -CustomerLocationKey                  1                                   -CustomerSiteKey
              -Effective Date                                                                                                           -DaysToPay
                                                                 -C reateDate : Da te                                                                                                                                                      0..*                                   0..*                                                                                                                                                                                              *
              -CreateDate : Date                                                                                                        -CreateD ate                                                                                                                                                                                                                                                                                                                                                                                       *
                                                                 -EndDa te : D ate                                                                                                                                 Discount                                                                                                                                                                                                              1            C ustom er
              -EndDate : Da te                                                                                                                                                                                                                                                                                (C on tact)
                                                                                                                                                                                                                                                                                                        Lea dProject
                                                                 -Produ ctComponen tNa me                                                                                                                                                                                                                                                                                                                                                                                           1
              -De scription                                      -D escriptio n                                                                                                        -D iscoun tId                                                                  Contract                          -Le adId
                                                                                                                                                                                                                                                                                                          -ProjectId                                                             0..*                                           0..*               -C C ID                                          0..*
                                                                                                                                                                                                                                                                                               0..*                                                                                                                               1

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            aggregation of base components
              -Orderable                                                                                                                                    -Discounts apply to        -Sta tus : in t                                                                                                                                  *                                                                                                                                                                         0..*     B illing A cc ount No de   *
                                                                 -H elpLink                                                                                                                                                                                                                               -                                                                                                      -H as pre se nce at
              -DisplayN ame                                                                                             *                                                              -C reateDate                                                                                                                  1 ..*                      *
                                                                 -Version                                                                                                                                                                                                                                                                                                                                                                                                                                                 -BillingAc co untId
              -XMLPath                                           -C lassification                                                                                                      -EffectiveDate : Date                                                                                                                                1
                                                                                                                                                                               *       -EndDate : Da te                                                                                                                                     1
                                                                 -XMLPath                                                                                                                                                                                           0..*                                                                                                                                                                                     1
                                                                 -XPa th                           1..*                                                                                -D iscoun tType (Standard , Grow th, Waiver ,...)                                                                                                                                                                                                                             1
                                                                                                                                                                                       -Level (Offer , Product, Prod uct Bundle Gro up , Product Bundle )                                                 0..1           -Coordinates delivery of                                   Contract
              *                                                                                                          *                                                             -Geo graphic Area
                                                                                                                                                                                       -GrowthAssessmentBa se
                                                                                                                                                                                                               Related Solution X -Ref                                                                                                                                                                                  Product Instance Package
                                                                    *                                                                                            1..*                                         -SolutionId
                                                                                                                                                                                       -GrowthAssessmentAmoun tPercentage
                                                                                1                                                                                                                                                                                                                                                                                                                            1                 -Located at -Located at
                                                                                                                                                                                                                                                                                                                                                                                                                                                0..*                     0..*
                                                                                                                         -Rated at                                                     -D iscoun tFre quency -SolutionId2
                                                                                                                                                                                       -D iscoun tC alculationBase
                                                                                                                                                                                                              -RelationshipType                                                                        O ffe r                 -Is pr opo sed for
                                                                    *                                                                                   R atePla n                     -D iscoun tC alculationMeth od
                                                                                                                                                                                                              -Sequence                                                                           -O fferTa g                                                         *                     1                                            Component Instance-Sells to
                                  Product Attribute                                                                                          -PricePla nKey                            -D iscoun tAmountPercentage                                                                                                                                                                                                       0..*
                                                                                                                                                                                       -D iscoun tEligibleCharges                          1     0..*                                                                          1 ..*                                                                                    -is a ss ig ned to                             1

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            How to identify, propose and
                                -Produ ctAttribute Key                                                                                       -Statu s : int                                                                                                                                                                                                                                                                     0..*
                       *                                                                                                                     -EffectiveDate : Da te                                                                                                                                                                                                                                     1..*               0..*                   Sales Pers on
                                                                                                                             *               -CreateD ate                                                     1                                                                                                                                                           Op portunity                  1        -Belongs to                                      1..*
                                                                                                                                             -EndD ate : D ate                                                                                    Solution                                                                                                  *                                                                            1       -SalesId
                                                                                                                                                                                                                       *                                                                                                                                              -O pp ortu nityId                                                     1..*     -Built from
                                                                                                                                             -State -pro posed ,contracted                                                                                                 -Is comprised of                                                         1   *
                                                                                                                                                                                                                                             -SolutionId                                                                       1..*
                                                                                                                                                                                                                                                        1                                                                                                                                        1..*                                          1
                                                                                                                                                                                                                  Commitment       0..*                                                                                    *                                                                                                                          1
                                                                                                                                                             1                             -CommitmentKey                                                           1..* 0..*                      Produ ct
                                                                                                                                                                                                                                                                                                                               Activity                                   0..1
                                                             0..*                                                                                                                                                                                                                                                                                                                                                                              Product Instance
                                                                                            0..*                                                                                           -Status : int                                                                                      -Prod uctTag          1
                                                                                                                                                     1                                                                                    *                  0..*                                                           -Is prop os
                                                                                                                                                                                                                                                                                                                           -ActivityId ed for                                                                                           *
                                                                                                                                                                                           -Effe ctiveDate : Da te                                                                                                                                       -Specifies an activity for
                                                                                                                                                                                           -EndD ate : Date

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            approve objects
                           Supplier/C omponent Profile                                                                                                                                                                                                                                                                                                                                                                         1..*
                                                                                              Supplier                                                                                     -Crea teD ate
                           -SupplierId                                                                                                                    ProductRate                      -CommitmentType(Standard, Early Term, Shortfall, ...)                     Customer Contact Event                  *
                           -Co mpo nentId                                               -SupplierId                                                                                        -Level(Offer, Pro duct, ...)                                              -EventId                                                         1..* *        -Grouped into
                                                                                                                                     -ProductRa teKey
                           -Inven toryLevels                            1..*        1                                                -Status : int                                         -Geogra phicArea                                                          -Even Type
                                                                                                                                                                                                                                                                                                                        0..*                                                 * 1..*                                      C ustom er related by 1
                                                                                                                                                                                                                                                                                                                                                                                                                               -Are Lo cation                    *-has a sso ciate d                   A ddres s
                                                                                                                                     -EffectiveD ate : D ate                               -Main Commitment             1        -Designed using                                                                                                                                                                                                                                                    -Ad dres sId
                                                                                                                                                                                                                                                                                                                                                                                                                        -C ustome rLo cation Id
                                                                                                                                     -Cre ate Date                                         -Frequency                                                                                                                                                                        Solu tion
                                                                                                                                     -En dDate : Date                                      -AssessmentBase                                                                                                                                                                                                                                                       1                          *
                                                                                                                                                                                           -Calcula tionMethod Std Sol Template                                                                                                                                           -So lution Id Group
                                                                                                                                     -Type (MR C, NR C, Can celation , Ancillary)
                                                                                                                                     -Quantity /R ange                                     -Te rm                                                                                                                                                                                                                                1
                                                                                                                                     -Rate                                                 -UnitOfMeasure          -SolutionTemplate                                                                                                                             1*                                                                                              *
                                                                                                                                                                                           -EligibleCh arges (N RC, MRC , All, ...)                                                                                                                                         -ActivityGroupType
                                                                                                                                     -Currency                                                                                                                                                                                                                                                                                0..*
                                                                                                                                                                                           -RetireMainCommitmentCa p                                                                                                                                                                                                                 Related
                                                                                                                                                                                                                                                                                                                                                                                                                            C us tome r Site Products X -Ref
                                                                                                                                                                                                                                                                                                                                                                                        1                                              -ProductInstanceId
                                                                                                                                                                                                                                                                                                                                                                                                                            -C us tom erSiteId

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          SOA Service Best Practices:
                                                                                                                                                                                          -C harge s used to retired       *
                                                                                                                                                                                                                                                       -Prepared for               1                                                            0..*
                                                                                                                                                                                                                                                                                                                                                            Related Activities X -Ref
                                                                                                                                                                                                                                                                                              1                                                             -ActivityId                                                                                                             0..*
                                                                                                                                                                                                                                                                       Customer                                                                             -ActivityId2
                                                                                                                                                                                                                                                                    -CCIKey                                                                                 -Sequence
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Proposal Option

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Strategy for using complex

      Circuit Schema                                                                                                                                                                                                                                         Solution, Order (CSI )
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            objects in SOA APIs
                                            High Level Data Flow Diagrams
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Strategy for object-agnostic
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Data Dictionary:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Store and discover target objects
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Link to SOA Repository operation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Document data translations for
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            key applications and flows

Page 15                                                                                                                                                                                                                                                                                                                                     Copyright © 2006 AT&T. All rights Reserved.
 SOA Framework
A SOA framework is used for consistent delivery of SOA
services across parallel teams.
                                                                 A SOA Taxonomy divides the
                                                                 enterprise into domains
                                                                 SOA Naming Standards
                                                                 improve service discovery
                                                                 Best Practices provide
                                                                 guidance on service scope
                                                                 Architects specify the „To Be‟
                                                                 Target View for each domain
                                                                 An Inventory of existing
                                                                 services is performed
                                                                 A SOA Repository captures
                                                                 service definitions online
                                                                 A Solution Design Flowchart
                                                                 specifies how Designers
                                                                 interact with Target Architects
                                                                 A Service Inventory template
                                                                 captures service impacts in
                                                                 SOA Design Templates

Page 16            Copyright © 2006 AT&T. All rights Reserved.
 SOA Tools
SOA tools are used to manage adoption, performance &
reuse of SOA services, plus compliance with standards
                                                      A SOA Repository captures
                                                      service definitions online:
                                                       − Promotes reuse of services
                                                         and communicates the target
                                                      A simple SOA Logger may be
                                                      used to log SOA activities at
                                                      various levels of detail:
                                                       − Captures clients, versions,
                                                          access frequency, latency,
                                                          dependencies and more
                                                      A SOA Dashboard tracks reuse
                                                      and adoption of the „To Be‟ target
                                                      by application & domain
                                                      A Data Dictionary is the database
                                                      of record for target data objects
                                                      and abstractions

Page 17           Copyright © 2006 AT&T. All rights Reserved.
   ‘Target’ and Implemented Services
   The SOA Repository supports both target & implemented

  „Target services‟                                                           “Implemented
  describe „To Be‟                                                            services” are
  functional capa-                                                            actually placed
  ilities to be built                                                         in production,
  out over time,                                                              and are further
  as defined by                                                               qualified by a
  architecture.                                                               “Phase” attribute.

  The SOA Repository is a design time discovery tool leveraged heavily by Solution
Designers working on time to market projects. The UI is optimized for fast assimilation
    of enterprise service functionality down to the data passed to/from operations.

  Page 18                       Copyright © 2006 AT&T. All rights Reserved.
 Tactical SOA: Delivering Solutions
Tactical SOA is tasked with specifying and reviewing
abstract SOA services in project solution designs.
    Design Templates and Governance Processes must be modified to capture
    and review service choices & impacts.
     − Specific target/production services must be identified, but the focus is on
       abstract service functionality (down to the data level); not on middleware.
                                                                          Phase     Production – Target            Production – Existing                    To Be Deleted
           Service Inventory Template                            Impact
                                                                                    Create a target operation      Create a non-target operation      Create an operation which is
                                                                                                                                                      expected to be deleted

                                                                                    Extend an existing operation   Extend an existing operation not   Extend an existing operation which
                                                                                    mapped to target               mapped to target                   is marked for deletion

                                                                                    Reuse an existing operation    Reuse an existing operation not    Reuse an existing operation which
                                                                                    mapped to target               mapped to target                   is marked for deletion

                                    Service impacts
                                                                             SOA Services Architecture Diagram
                                   must be specified
                                                                                                                                  Capacity Check Service
                                   as summarized on                                                                          3    Operation: initiateCapacityCheck
                                     the next slide.                                                                               Invoked via an event received by the
                                                                                                                       1           GenericEventListener WSDL
                                                                                      Event Subscription Service
                                                                                            Operation: subscribe                                            The service-
                                                                                                                                                            operation is
                                                                                                                                                           identified with
             Note: Every service listed                                     The eTOM popsicle                      Event Broker                                a label
                                                                             stick convention
            here must be present in the                                      shown at right is
           SOA Repository! Leverage the                                         used to depict                             Event Submission Service
            Target Architects and SOA                                       service-operations.                        2   Operation: notify
               COE per the Design                                          The circle represents
                                                                            a service-operation
              Solutioning Flowchart.                                       and extends out from                             Sys2 generates                  explanatory
                                                                                                                            an event if :                   text may be
                                                                              its host. Clients
                                                                                                                            • Condition 1                     provided
                                                                                connect to it.                              • Condition 2

Page 19                                       Copyright © 2006 AT&T. All rights Reserved.
    Governance                                                  SOA Enable                           Review
                                                                                                 (Naming, Taxonomy,
                                                                                                                                      SOA Modified
    SOA drives benefit by                                         Design                           Granularity, Data                    Process
                                                                 Templates                            Objects)                          Design
    governing the creation
                                                                   Architects                    Express/One Team                      Templates
    and use of interfaces

     Create &                    Review                           SOA Repository
                           (Naming, Taxonomy,
   Refine Target             Granularity, Data
       APIs                                                           Target APIs
                                Objects)                                                                 Discover                         Design
Architects & Engineers         Design COE                                                             Existing/Target                     Solution
      Manage                     Review                              Existing                                           Architects
      Existing              (Naming, Taxonomy,                    Production APIs                                      & Engineers
                              Granularity, Data
       APIs                      Objects)
Architects & Engineers         Design COE

                         SOA Dashboard                                                                   Approve                          Approve
                            Reports                                  Implemented                        (Middleware                   (Naming, Taxonomy,
                         (Clients, Dependencies,                                                         Technical                      Granularity, Data
                             Repository Errors,                          APIs                            Standards)                        Objects)
                                & Progress)
                                                              Engineers & Developers                      IRB COE                        Design COE

         Log                  Receive
     Invocations             & Process                             Legend:
     (Per SOA Log                                                       Tactical          Strategic            Supporting Artifacts          Runtime
                          (Batch or Real Time
         Level)                Updates)                                 Projects          Groundwork           and Infrastructure            Activities

  Runtime Services         SOA Logger
    Page 20                                        Copyright © 2006 AT&T. All rights Reserved.
Foundation Integration Strategy
A real world Enterprise will blend two fundamentally
different ways of approaching integration.
•   The Integration Broker or ESB approach:
    –     The challenge of ESBs lies not their technology but in the centralized
          organization required to support and develop integrations with it.
              Many protocols and handshaking schemes can be supported but,
              To the extent that it gets involved in pair-wise integrations, the ESB
              organization must be able to provide resources when they are requested or
              risk being branded as a bottleneck.
•   The Interoperability Standard approach:
    –     The interoperability standard approach specifies enterprise-standard
          protocols and handshaking schemes, and requires all network endpoints
          to develop support for those standards.
              Once exposed to the network, a service is consumable by all endpoints.

                        The choice of integration strategy has
                        significant time and cost implications

Page 21                          Copyright © 2006 AT&T. All rights Reserved.
 The ESB / Integration Broker Approach
                                                                                 Potential bottleneck if
Supports many                                                                    the ESB organization
protocols and                       Organization A                               gets involved in most
 handshaking                            Service „A‟                              client-server integra-
   schemes                                                                        tions (organization
                                                    Protocol „A‟
                                                    Handshaking „A‟                 scalability issue)

                                        Service „A‟
                                                                                          The ESB Team
Extra development
  (relative to an
                            ESB Organization                                                 has great
                           Client „1‟                   Client „2‟                         control over
 interoperability         Service „A‟                  Service „A‟                        enforcement of
    approach)              Adapter                      Adapter                           SOA Standards
                              Protocol „1‟                              Protocol „2‟
                              Handshaking „1‟                           Handshaking „2‟

                      „A‟ Client                            „A‟ Client
                      Client „1‟                          Client „2‟
                    Organization                        Organization

 Page 22                  Copyright © 2006 AT&T. All rights Reserved.
  The Interoperability Standard Approach
                                                                          Service providers
   All endpoints
                                                                         may have to express
 support standard
                                  Organization A                           their services in
  handshaking &
                                      Service „A‟                           more than one
                                                                         protocol (as dictated
                            Standard               Standard
                          Protocol „1‟             Protocol „2‟            by the standard)
Control over SOA
standards is more
                                                                            There is no need
   difficult since        Interoperability                                  to interlock with
  integration are
 implemented by              Standard                                         a centralized
                                                                            ESB organization
    many teams

 Leveraging new
  protocols is as
 easy as with the      „A‟ Client                           „A‟ Client
  ESB approach         Client „1‟                         Client „2‟
                     Organization                       Organization

  Page 23                 Copyright © 2006 AT&T. All rights Reserved.
Interoperability Standard
An Interoperability standard must minimally cover:
                                                           Protocol Standards
                                                             − Strategy for requirements that
                                                                    exceed protocol capabilities
                                                                      Web Services has issues with
                                                                      large messages and extreme
                                                            − Credentials, callbacks, message
                                                                    ID, guaranteed delivery and
                                                                    other message semantics
                                                           Vendor Product Standards
                                                           Definition of the interoperable
                                                           subset of protocol capabilities
                                                             − WSDL & XML Schema Best
                                                                    Practices for Web Services
                                                           Versioning strategy
          There is a danger in relying on emerging industry standards
              since vendors often implement them inconsistently
Page 24                      Copyright © 2006 AT&T. All rights Reserved.
AT&T SOA Journey and Progress
 2001-2003: Web Services Strategy
A Web Services interoperability strategy was adopted in
2001 with the hope of ending redundant interface creation.
                                                                                   Redundant interfaces
                                                                                   common but the IRB
                                                                                   detects them too late      2004
              Establish formal                                            2004                              We Need
            governance authority                                     Executive Edict:                         SOA
             through the SDLC          2003
                                                                     Thou Shalt Use
                                   SDLC Process                       Web Services!
Confirmation                         Interlock
   of IRB    2003
                     Political battles                                                 Review interfaces and
                      over interface                    2003                            help project teams
                         reviews                      First WS                          meet the standards
                                                       Appear                                                   Interface
Web Services                                                                                        2003         Review
 standard                                                                                                      Board (IRB)
  adopted                                                                     2002   Communications
     2001                 2002                    Formulate                            & training
             Publicize Web Services                                    First Interop
                                                 standards &            Standards
             the policy Center of                test vendors           Published

Page 26                                  Copyright © 2006 AT&T. All rights Reserved.
  2004-2006: SOA Strategy
 In 2004, the Web Services Interoperability strategy matured
 into a true SOA strategy with strong Executive support.
                                                                        SOA Tool Updates
                                                                        & Merger Planning            2006
                  Design template                                                                  SOA Tool
                modifications & SOA                2006                                           Updates incl.
                governance strategy                                                                Dashboard
                                              SDLC Process
                                            Interlock for SOA
SOA Tools:                                                                      Milestone: The business signs off
Repository 2005                                                                  on $40 Million in SOA Savings
 & Logger
                  Product agnostic            2005                                Start of target definition:
                    APIs & target                                                    750 operations in 3
                  enterprise objects        Data COE                               passes over 1.5 years
                                                                                                  Target Service
SOA Center of                                                                                 2004 Definition
 Excellence                                                                                          Begins
Created (COE)
                                           2004                         Labs wide
    2004           SOA plan,              Naming,                     communications
                  approach &            Taxonomy &                       & training
                  ROI model            Best Practices

 Page 27                          Copyright © 2006 AT&T. All rights Reserved.
 Other Approaches To SOA
One approach does not fit all. Different strategies may
work better for different organizations. For example:

          Implement target services in advance of
          Solution Design actually needing them.
            − Requires strategic funding!
          Build the SOA practice on top of key
          applications rather than the SDLC.
            − Work hard to define and implement highly
              reusable interfaces on key applications.
            − Build the NPV of the future stream of
              maintenance and operational costs into the
              estimates for non-standard functionality:
                 Make it unacceptably high!

                                                                            AT&T has
                                                                    experimented with and
                                                                       had success with
                                                                     different approaches.
Page 28               Copyright © 2006 AT&T. All rights Reserved.
A SOA program offers great potential to cut cost,
complexity and time to market.
  The SOA program comes into focus when the business goals are clearly
  articulated and quantified.
  Defining terms is very important since the words „SOA‟ and „service‟ are
  heavily overloaded and have been successfully appropriated by vendors.
  Executive support is essential to overcoming inertia & resistance. Many will
  question the need for SOA and the rationale for changing familiar practices.
  An ESB is not the only integration option for implementing SOA. In 2001,
  AT&T adopted a highly scalable interoperability strategy in which ESBs were
  the exception and not the rule.
  Other keys to success are: changing the development process, inventorying
  existing services, defining target services, deploying an online repository,
  and adopting a management strategy & dashboard.

Page 30   May 29, 2010     Copyright © 2006 AT&T. All rights Reserved.
                                             For more information regarding
                                             this presentation:

                                             Please Contact
                                             Rich Erickson
                                             AT&T Labs

Page 31   May 29, 2010   Copyright © 2006 AT&T. All rights Reserved.

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