1. Establishing Product Design Specifications (PDS)
Session 2010/2011 2
SMC4523
AUTOMOTIVE ENGINEERING DESIGN
Establishing Product Design Specifications (PDS)
Assoc. Prof. Dr. Kamarul Baharin Tawi
Dr. Nurulakmar Abu Husain
Ref: Stuart Pugh - Total Design ~ Product Design Specification (PDS)
Stuart Pugh:- Total Design - Product Design Specification (PDF); KBT

2. Product Design Specifications (PDS)is
our
BASIC REFERENCE

3. Dynamics rather than Static

4. If during the design phase – there is good reason for changing the basic PDS  CHANGE

5. Must be considered as EVOLUTIONARY, COMPREHENSIVE WRITTEN DOCUMENTS which, upon completion of the design activity, has itself evolved to match the characteristics of the final product.

6. Note:- in some cases – PDS may be CONTRACTUAL DOCUMENT  the implications of the proposed changes upon the contract should be considered.

7. PDS – must be COMPREHENSIVE & UNAMBIGUOUS

8. To be successful  you have to be systematic & thorough, paying meticulous attention to detail from the beginning to the end

9. Professional go WRONG!!

10. Remember that, in this day & age, the absence of a PDS  will result in designs that almost without doubt will fail in the market. Poor PDS lead to poor designs. Good PDS do not necessarily result in the best designs but they do however make the goal at least attainable.

11. The constituent elements of a PDS are applicable to ALL products – be they PUMPS or PROCESS PLANTS. Do not cut out any of the elements!!! Even though the information they generate starts to overlap & integrate

12. Elements of PDS

13. PERFORMANCE demanded or likely to demanded should be fully defined:- how fast, how slow, how often – continuously or vice versa, loading likely – electrical, hydraulic or pneumatic, …

14. All aspects of the product’s likely ENVIRONMENT should be considered & fully investigated:- temperature range, pressure range, humidity, corrosion from fluids – type of fluid or chemical, …

15. Elements of PARTIAL PDS

16. The PDS DOCUMENT Is a control document – it represents the specification of WHAT YOU ARE TRYING TO ACHIEVE – NOT OF THE ACHIEVENMENT ITSELF

17. The PDS DOCUMENT Is a USER document – FOR USE BY YOU & INDUSTRIAL SITUATIONS BY OTHERS (it should  be written succinctly [in a few words, briefly & concisely] & clearly)

18. The PDS DOCUMENT Never write a PDS in essay form – use SHORT, SHARP, DEFINITIVE STAEMENTS UNDER THE ELEMENTS HEADING (allow space for amendments & additions)

19. 2 headings/pg
Many pages
User friendly
Date it
Put issue no.
Clearly documents amendments
Vary your starting  …
eg. format of a typical PDF

20. The PDS DOCUMENT From the beginning, try to quantify parameters in each area – eg. Weight, height, … (if in doubt – estimate!!!)