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Product Design Specification

Product Design Specification. Lecture 5. Recognition of Need. Becoming Informed. Problem Definition. PDS in Design Process. Market analysis Background study. Product Design Specifications. PDS. Proposed by Pugh It is NOT the final specifications/achievements

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Product Design Specification

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  1. Product Design Specification Lecture 5

  2. Recognition of Need Becoming Informed Problem Definition PDS in Design Process • Market analysis • Background study Product Design Specifications 2

  3. PDS • Proposed by Pugh • It is NOT the final specifications/achievements • It is a control document of what designers try to achieve • It acts like a design checklist and applicable to all design applications • It is dynamic rather than static – can be improved, changed to suit design requirements • It defines the constraints/boundary of the design. 3

  4. Elements of PDS 4

  5. PDS • Performance – target, attainable values • Environment – effects on product during manufacture  use, effects on environment • Life in service – 7 days/week, 24hrs/day, @ X years • Maintenance – maintenance philosophy, need for special tools, ease of maintenance • Targeted production cost • Competition – data from benchmarking, IP, info search • Shipping – delivery method, lifting capability • Packing – cost & method of packing • Quantity – will affect other costs such as tooling, processes • Manufacturing facility – in-house or vendor, support system, machinery 5

  6. PDS (cont’d) • Size – affects user, cost, shipping & handling • Weight - affects user, cost, shipping & handling • Aesthetics – user perception or acceptence • Materials • Product Life Span – life in production line • Standard and Regulations – government, BS/ISO/MS/DIN • Ergonomics • Customer – target customer • Quality & Reliability – subjected to standards (BS, ISO, etc) • Shelf Life – storage risks and problems • Processes – processes involved, in-house facility/vendor • Time-scales – period to complete the design 6

  7. PDS (cont’d) • Time-scales – time needed to complete the development • Testing – methods, facility, requirements/standards • Safety – safety requirements • Company Constraints – house, facility, cost • Market Constraints – local conditions, full market knowledge • Patents, literature & Product data – clash & IP laws • Political & Social Implications – social unrest, rejection • Legal – product liability legislation (product defects, defects of manufacture, defects of design, etc) • Installation – assembly consideration (stand alone, subsystem) • Documentation – manual, user instructions, etc • Disposal – environment. 7

  8. Writing PDS Document • It is a control document • Should be clearly written • Use sharp and definitive statements, NOT is essay form • Try to quantify parameters or estimate a figure • Vary your starting point • Date and put your issue number • Clearly document amendments 8

  9. Format of PDS 9

  10. Assignment 2 • Carry out your information analysis of the car jack design based on your information analysis plan. • Develop your PDS based on your information analysis. Due 3rd July 2003 10

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