The Design Specification Phase What Should be Addressed in the Product Design Specification
Overview of Design Process
Another View
Design Specification Phase What to Include Performance temperature range altitude humidity shock loading corrosion resistance noise levels insects user capability
Design Specification Phase What to Include Service Life assessed against what? Maintenance by whom? how often? Target Production Cost established at outset
Design Specification Phase What to Include Competition competitive products patents papers formal evaluation Shipping Packaging
Design Specification Phase What to Include Quantity market production costs Manufacturing Facility make it ourselves? outsource? what country?
Design Specification Phase What to Include Size constraints? Weight Aesthetics appearance finish what the customer sees!!!
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?
Design Specification Phase What to Include Ergonomics user interface Customer know what customer wants talk to them competitors trends
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
Design Specification Phase What to Include Shelf Life (Storage) very often overlooked Processes Time Scales design time tooling time materials delivery times
Design Specification Phase What to Include Testing why? how? when? Safety OSHA UL labeling
Design Specification Phase What to Include Company Constraints product history manufacturing capability financial attitudes Market Constraints know the market
Design Specification Phase What to Include Patents, Literature and Product Data research all the data Political and Social Implications
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 http://www.rose-hulman.edu/~voltmer/EC460F00/pds.pdf