1. Product Design Specification Lecture 5

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

3. 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.

4. 4 Elements of PDS

5. 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

6. 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

7. 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.

8. 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

9. 9 Format of PDS

10. 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 3 rd July 2003