The Design Specification Phase

1
The Design Specification Phase

• What Should be Addressed in the Product Design
  Specification

2
Overview of Design Process
3
Another View
4
Design Specification PhaseWhat to Include

• Performance
• temperature range
• altitude
• humidity
• shock loading
• corrosion resistance
• noise levels
• insects
• user capability

5
Design Specification PhaseWhat to Include

• Service Life
• assessed against what?
• Maintenance
• by whom?
• how often?
• Target Production Cost
• established at outset

6
Design Specification PhaseWhat to Include

• Competition
• competitive products
• patents
• papers
• formal evaluation
• Shipping
• Packaging

7
Design Specification PhaseWhat to Include

• Quantity
• market
• production costs
• Manufacturing Facility
• make it ourselves?
• outsource?
• what country?

8
Design Specification PhaseWhat to Include

• Size
• constraints?
• Weight
• Aesthetics
• appearance
• finish
• what the customer sees!!!

9
Design Specification PhaseWhat to Include

• Materials
• any restrictions?
• What do customers expect?
• Product Life Span
• as a market entity
• Standards and Specifications
• do any apply?

10
Design Specification PhaseWhat to Include

• Ergonomics
• user interface
• Customer
• know what customer wants
• talk to them
• competitors trends

11
Design Specification PhaseWhat to Include

• Quality and Reliability
• determine up front
• manufacturing process
• distribution logistics
• standards
• ISO 9000
• UL
• ANSI/IEEE
• EEC (EU)
• build in feedback to designer

12
Design Specification PhaseWhat to Include

• Shelf Life (Storage)
• very often overlooked
• Processes
• Time Scales
• design time
• tooling time
• materials delivery times

13
Design Specification PhaseWhat to Include

• Testing
• why?
• how?
• when?
• Safety
• OSHA
• UL
• labeling

14
Design Specification PhaseWhat to Include

• Company Constraints
• product history
• manufacturing capability
• financial
• attitudes
• Market Constraints
• know the market

15
Design Specification PhaseWhat to Include

• Patents, Literature and Product Data
• research all the data
• Political and Social Implications

16
Design Specification PhaseWhat to Include

• References
• Product Design and development, Ulrich and
  Eppinger, McGraw-Hill, Inc. 1995
• Total Design, Stuart Pugh, Addison-Wesley
  Publishing Company, 1991
• Personal experience, 1958-present
• http//www.rose-hulman.edu/voltmer/EC460F00/pds.p
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