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The Design Specification Phase
What Should be Addressed in the Product Design Specification
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Overview of Design Process
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Another View
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Design Specification Phase What to Include
Performance temperature range altitude humidity shock loading corrosion resistance noise levels insects user capability
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Design Specification Phase What to Include
Service Life assessed against what? Maintenance by whom? how often? Target Production Cost established at outset
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Design Specification Phase What to Include
Competition competitive products patents papers formal evaluation Shipping Packaging
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Design Specification Phase What to Include
Quantity market production costs Manufacturing Facility make it ourselves? outsource? what country?
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Design Specification Phase What to Include
Size constraints? Weight Aesthetics appearance finish what the customer sees!!!
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Design Specification Phase What to Include
Materials any restrictions? What do customers expect? Product Life Span as a market entity Standards and Specifications do any apply?
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Design Specification Phase What to Include
Ergonomics user interface Customer know what customer wants talk to them competitors trends
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Design Specification Phase What 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
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Design Specification Phase What to Include
Shelf Life (Storage) very often overlooked Processes Time Scales design time tooling time materials delivery times
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Design Specification Phase What to Include
Testing why? how? when? Safety OSHA UL labeling
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Design Specification Phase What to Include
Company Constraints product history manufacturing capability financial attitudes Market Constraints know the market
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Design Specification Phase What to Include
Patents, Literature and Product Data research all the data Political and Social Implications
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Design Specification Phase What 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
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