Product Development in Off-Site Construction Design For Manufacturing

1. Product Development in Off-Site ConstructionDesign For Manufacturing By Dr Mohammed Arif– licensed under the Creative Commons Attribution – Non-Commercial – Share Alike License http://creativecommons.org/licenses/by-nc-sa/2.5/

2. Product Development in Off-Site Construction Design for Manufacturing

3. Layout • The Design for Manufacture (DFM) Process: • The DFM Objectives • DFM Methodology • Product design principles for efficient manufacture • Design for Assembly (DFA): Process & Methodology • Design considerations • Design for Manufacture / Assembly Systems (DFM/A) • Case studies • Other considerations in DFM/A

4. The Design for Manufacture (DFM) Process Product Concept Process Concept Design Goals

5. The DFM Objectives Product Concept Manufacture Process Design Component Design

6. DFM Methodology (Boothroyd, et.al. 2002); Organisational Issues DFM Approach Product Design

7. Product design principles for efficient manufacture Number of parts Modular design Standard components Multi-functional Multi-use Ease of fabrication handling

8. Design for Assembly (DFA): Process & Methodology (Boothroyd, 2005); Properties that are of interest to designers Complete Systematic Measurable User friendly

9. Design considerations number of parts Fastening Cost of parts Assembly Labour Finishing Product Warranty

10. Design for Manufacture /Assembly Systems (DFM/A)

11. Case studies Ford Motors Braun & Sharp NCR Group

12. Other considerations in DFM/A: Check lists Differentiation Commercial Strategies

13. Test Questions: answer True or False • In the DFM process, design goals would include both manufacturing and product goals. (T/F) Ans. T • up to 60% or more of production decisions are directly determined by the product design. (T/F) Ans. F • Design for assembly as a central element of the design for manufacture, has three important characteristic. (T/F) Ans. F • The DFM process begins with a proposed product concept, a proposed process concept, and a set of design goals. (T/F) Ans. T

14. References • Boothroyd, G. (2005), “Assembly Automation and Product Design, 2nd Edition”, Taylor and Francis, Boca Raton, Florida, • Boothroyd, G., Dewhurst, P. and Knight, W., (2002), “Product Design for Manufacture and Assembly, 2nd Edition”, Marcel Dekker, New York, • Boothroyd, G., and Alting, L. (1992), “Design for assembly and Disassembly”. Keynote paper, Annals of CIRP, 41 (2), 625-636.CII (1986) “Constructability: A primer.” Publication3-1. Construction Industry Institute, University of Texas, Austin. • Chow, W. W. C. (1978). “Cost Reduction in product Design”. New York: Van Nostrand Reinhold. • Corbett, J., Dooner, M., Meleka, J. And Pym, C., (1991), “Design for Manufacture”, Strategies, Principles and Techniques, Addison-Weskey Publishers Ltd. • Ertas, A., & Jones, J. C. (1993), “The engineering design process”, New York: Wiley.

15. References • Fisher, M. (1993), “Automating Constructability Reasoning with a Geometrical and topological project Model.” Computing Systems in Engineering, 4 (2-3), 179-192. • Kuo, T.C, Huang, S.H. and Zhang, H. C., (2001), “ Design for manufacture and design for X”, Computers & Industrial Engineering 41, PP. 241-260. • Precision Metal, (1975), “Design for assembly”, July, 8-26. •  Stoll, H.W., (1988), “Design for Manufacture”, ME, PP. 23-29. • Stoll, H.W., (1986), “Product design for efficient manufacture”. Industrial Tech. Inst., Ann Arbor, MI. • Terry, W. R., Karni, ., and Richards, C.W. (1990) ” A knowledge based system for the integrated design and manufacture of round broach tools”, journal of Intelligent Manufacturing, 1, 77-91.