????????????????????? Product Specifications

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?????????????????????Product Specifications

• Chapter05

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Concept Development
System-Level Design
Detail Design
Testing and Refinement
Production Ramp-Up
Planning
Four Phases of Product Development
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Four Phases of Product Development
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• ????????????????????? (Product Specifications,
  Product Requirements, Engineering
  Characteristics, Technical Requirements)
• ??? ?????????????????????????????????????????????
  ????????? ????????????????????????????????????????
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• ???????????????????? Whats
• ????????????????????? Hows

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Concept Development Process
Mission Statement
Development Plan
Identify Customer Needs
Establish Target Specifications
Generate Product Concepts
Select Product Concept(s)
Set Final Specifications
Plan Downstream Development
Test Product Concept(s)
Perform Economic Analysis
Benchmark Competitive Products
Build and Test Models and Prototypes
Target Specs Based on customer needs and
benchmarking
Final Specs Based on selected concept,
feasibility, models, testing, and trade-offs
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• ?????????????????

Mission Statement
Development Plan
Identify Customer Needs
Establish Target Specifications
Generate Product Concepts
Select Product Concept(s)
Set Final Specifications
Plan Downstream Development
Test Product Concept(s)
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???????????????
Mission Statement
Development Plan
Identify Customer Needs
Establish Target Specifications
Generate Product Concepts
Select Product Concept(s)
Set Final Specifications
Plan Downstream Development
Test Product Concept(s)

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?????????????????????????????????????????? 1
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• ??????????????????????
• 1. ???????????????????????????????????????????????
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• ?????? Tree Diagram
• ???????????????

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?????????????????????????????????????????? 1
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• ??????????????????????
• 2. ???????????????????????????????????????
• 3. ??? Affinity Diagram ??????????????????????????
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• 4. ?????????????????

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Product Specifications ExampleMountain Bike
Suspension Fork
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Start with the Customer Needs
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?????????????????????????????????????????? 2
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?????????????????????????????????????????? 2
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?????????????????????????????????????????? 3
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??????? 3 ????????????????
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?????????????????????????????????????????? 4
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?????????? - ?????????????? - ????? - ??????????????????????????????? - ??????????????????? - ?????????? - ??????????????????
????????????? - ?????? ?????????????????????? - ??????????? - ????????????
??????? - ??????????????????? - ???????????????????????? ??????????????????????????????????????? - ????????????
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???????????????
Mission Statement
Development Plan
Identify Customer Needs
Establish Target Specifications
Generate Product Concepts
Select Product Concept(s)
Set Final Specifications
Plan Downstream Development
Test Product Concept(s)

• ??????????????????????????????????????????????
• ?????????????????????????????????
• ?????????????????????????????????
• ??????????????????
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????????????????????????????????????????? 1
?????????????????????????????????

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• ?????????????????????????????????????????????????
  ????????????? ????
• ???????????????????
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?????????????????????????????????? ??????? 2
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• ?????????????????? BOM ??????????????????????????
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?????????????????????????????????? ??????? 3
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Specification Trade-offs
Estimated Manufacturing Cost ()
Score on Monster (Gs)
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?????????????????????????????????? ??????? 4
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?????????????????????????????????? ??????? 5
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Quality Function Deployment(House of Quality)
technical correlations
relative importance
engineering metrics
benchmarking on needs
customer needs
relationships between customer needs
and engineering metrics
target and final specs
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Quality Function Deployment, QFDHouse of
Quality, HOQ