Docstoc

Capilla

Document Sample
Capilla Powered By Docstoc
					  A Web-based Tool for Managing
  Architectural Design Decisions


Rafael Capilla, Francisco Nava, Sandra Pérez
Universidad Rey Juan Carlos de Madrid

Juan C. Dueñas
Universidad Politécnica de Madrid

SPAIN
     Motivation

     Architectural decisions are sadly lost during
     architectural construction processes.

     The present viewpoints of the architecture generally
     do not include the design decisions explicitly
     as part of their architectural knowledge (AK).

     Design decisions are not shared and/or reused.

     It’s hard to recreat decisions when they haven’t
     been documented before.

     To continue with the initial work presented at EWSA05.

R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
     Existing Problems


          Changes on existing teams.

          Traceability issues.

          Explain the rationale by which the decisions
          were made.

          Lost of Architectural Knowledge.

          Lack of specific notation.

R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
      Some Current Efforts

A. Jansen, J. Bosch (RUG)

  Software architecture as a set of design decisions (Metamodels for a
  first class representation of DD. The Archium approach)
GRIFFIN Project (Vrije Universiteit, RUG)

 Model notations, tools and methods to extract, represent and use
 architectural knowledge (AK)
P. Kruchten (University of British Columbia)
  Building up and exploting architectural knowledge
  AK = Context + Assumptions + Decision + Design
 Taxonomy of DD (ontologies)
U&SA project at the Human-Computer Interaction Institute &
Software Engineering Institute at Carnegie Mellon

R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
      Past and Current Related Work

  Software architecture: the Next Step (J. Bosch, EWSA 2004)
  Design decisions trees (A. Ran, J. kuusela, 1996)
  Architecture decisions: Demystifying Architecture
  (J. Tyree, A. Ackerman, IEEE Software, 2005)
  WICSA 2005 papers
  The Decision View of Software Architecture (J.C. Dueñas, R. Capilla
  EWSA 2005)
  Design rationale systems: Understanding the issues
 (J. Lee, IEEE Expert (12) 3, 1997)
  Explicit assumptions enrich architectural models (P. Lago, van Vliet
   ICSE 2005)
  A Framework for documenting design decisions in product families
   development (A. Alonso, G. Leon, J.C. Dueñas, A de la Puente,
   3rd Conf. on Eng. Complex Computer Systems, 1997).

Others from the AI community, Knowledge Management area
R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
     Our Position

                  The Decision              View in SA
        A “new” architectural view for this viewpoint
              from a technical perspective
              A “4+1” + 1 view model compared
                    to Kruchten’s approach
                                                                  Current
                                                                     SA
                                    The                           Views &
  Stakeholders
                                Decision View                    Viewpoints

     Documentation                 Notation                    Process

R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
       Requirements for the Decision View

  Multiperspective support for different stakeholders

  Visual representation (explicit graphical notation)

  Complexity control to manage and organize the
  decision network

  Groupware support for interaction between stakeholders

  Chronological visualization




R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
       Software Architecture Construction:
       An Iterative Process


   Reference
    Models                                              Software
                            Reference
                                                       Architecture
                           Architecture
 Architectural
  Patterns &
    Styles
                                                       Customization
                   Design Decisions
                                                    Product / System
                                                      Architecture

R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
        Decisions Linked to Architectural Products

                             Trace
        Decision 1                          Decision 2



Trace                                        Decision 3



                                              Decision 4
    SW
Requirements

                      1st Iteration                              2nd Iteration



R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
       Requirements for Tool Support


  Multiple projects and architectures
  Different categories of stakeholders
  Architecture iterations
  Support for design decisions (patterns, styles, others)
  Dependencies between decisions
  Alternative decisions
  Architecture visualization facilities
  Documentation generation
  Connection to functional and non-functional
  requirements



R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
      Meta-model for the DD Process




R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
     The ADDSS Tool

  First prototype at: http://sevilla.escet.urjc.es/~sperez/ADDSS/




R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
     The ADDSS Tool                  Stored list of      o Pattern name
                                     patterns and styles o Pattern description
                                                              o Image




R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
     The ADDSS Tool                  Software requirements
                                     added by the user




R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
     The ADDSS Tool                  Requirements are related
                                     to design decisions




                                              Dependencies between
                                              decisions can be defined



R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
     The ADDSS Tool                  Architecture construction seen
                                     as an iterative process
                              Thumbnail images of architectures




R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
                                     Architecture documentation (3 docs)
     The ADDSS Tool
                                       o Project (Architectures (Req, Iter, DD))
                                       o Architecture (Req, Iterations, DD)
                                       o Iteration (DD, Req. for each DD)




R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
     Conlusions
     A first class of tools for supporting decisions
     explicitly

     Tool support for an iterative and evolving process

     A learning and recording process for understanding
     design decisions

     Connection between requirements, decisions and
     architectures

     A way by which we can recreate recorded decisions

     Knowledge can be shared between the stakeholders
R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
       Work for the Next Day After this Conference

         Support for different architecture views

         Quality attributte specification

         Queries and rules for reasoning about decisions

         Discriminate types of dependencies

         More detailed information for DD

         Extend the proposed meta-model

         Explicit notation for DD
R. Capilla, F. Nava, S. Pérez, J.C. Dueñas, ICSR9-SHARK’06, Torino, Italy
A brief note for people
interested in the tool
 Please email us before (rafael.capilla@urjc.es)
  because we are changing the platform and improving
  some features

 Temporarily use the following URL

          http://triana.escet.urjc.es/ADDSS
Thank you
for your time…

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:4
posted:9/18/2012
language:Unknown
pages:21