Manufacturing Systems by UUzgpZav

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									Manufacturing Systems
Production Strategy Classification
Based on:-
  customer lead time - max time taken
   between placing an order and delivery
  Manufacturing lead time - max time
   between receipt of an order and delivery of
   the product
Need to match manufacturing lead time
 with customer lead time
Four strategies used to match these lead
 times:
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Engineer to Order (ETO)
  New product, complex product,
   unique designs produced in single
   units (examples - construction)
  Very common in Project type
   manufacture
  Long manufacturing lead times




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Make to Order (MTO)
  Existing designs with proven production
   processes
  Unpredictable demand(examples -
   special spec computer)

Assemble to Order (ATO)
  customer lead time less than manufacturing
   lead time
  forecasts of product mixes certain or response
   to customer orders
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Make to stock (MTS):
  customer lead time less than
   manufacturing lead time - stock the
   products so the the manufacturing lead
   time is minimized
  product has few options but good
   demand




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Product Development Cycle
starts from MARKET RESEARCH, to
 REVIEWS, DESIGN ENGINEERING,
 PRODUCTION ENGINEERING,
 MANUFACTURING, CUSTOMER USE
Can be a new product or existing
 product changes
New Product:
  Form, fit and function;
  order winning criteria
  CONCURRENT ENGINEERING
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Existing product:
  activity can start from any where


Enterprise Organization
CIM implementation affects all facets
 of the enterprise
Various sections of the enterprise are:
  sales and marketing - provide useful
   information required in pricing, product
   design, suppliers, e.t.c

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Finance and management - coporate
 goals, financial functions, long-term plans
Product/process definition - design,
 conceptualization, materials,
 documentation (CAD/CAD/CAE)
Manufacturing planning and control -
 interface between engineering and shop
 floor - MPS , MRP, PAC, Capacity planning
Shop floor - processes, material
 movement, floor control - AUTOMATION
Support organization


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Overview of Product
Design and Production
Engineering


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Considerations:
  product design - critical design steps
  software for drawing, analysis, modeling,
   simulations, testing and design
  Concurrent engineering
  design for quality




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Product Design
need for automating design process in CIM
  generates the initial product data and drawings
Functional automation - islands of design
 automation;
  potentially productive but has negative enterprise
   related effects
Single Enterprise database with a single image
 of all product information - ENTERPRISE DATA
 INTEGRATION
Communications:-
  LAN - supports inter-departmental design activities
  WAN - will link enterprises and their
   contractors/suppliers
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Organization Model
Design team -
  product design
  analysis
  materials selection
  documentation (both design and production)
Production engineering
  production standards(labor, process, quality)


Integrated Product and Production design

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Design Process
Form, Fit and Function
  Form - desired shape, style and character
  Fit - relates more to market functions
  Function - performance, reliability, maintanability


Conceptualization:
  Typical - similar to previous designs - repetitive design
  Atypical - product need that is totally new - concept
   approach
  (Discuss some examples)




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Synthesis:
  material specification
  initial additions of geometric features to the
   conceptualized design
  dimensional details
  DFA and DFM (DFMA)


Analysis:
  analytical techniques such as Mass property
   analysis or Finite element methods



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Evaluation
  checks design against all requirements, form, fit,
   dimensions, etc
  match manufacturing and assembly requirements
  Rapid prototyping


Documentation
  detailed drawings and assembly drawings
  details of materials and parts
  BOM
  Product electronic data files




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Concurrent Engineering
design and production design considered
 together




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