The Pugh Controlled Convergence method: model-based evaluation and implications for design theory

• Published in: Research in engineering design 2009-03, Vol.20 (1), p.41-58
• Main Authors: Frey, Daniel D., Herder, Paulien M., Wijnia, Ype, Subrahmanian, Eswaran, Katsikopoulos, Konstantinos, Clausing, Don P.
• Format: Article
• Language: English
• Subjects: CAE) and Design; Computer simulation; Computer-Aided Engineering (CAD; Convergence; Design theory; Engineering; Engineering Design; Original Paper
• ISSN: 0934-9839; 1435-6066
• DOI: 10.1007/s00163-008-0056-z

This paper evaluates the Pugh Controlled Convergence method and its relationship to recent developments in design theory. Computer executable models are proposed simulating a team of people involved in iterated cycles of evaluation, ideation, and investigation. The models suggest that: (1) convergence of the set of design concepts is facilitated by the selection of a strong datum concept; (2) iterated use of an evaluation matrix can facilitate convergence of expert opinion, especially if used to plan investigations conducted between matrix runs; and (3) ideation stimulated by the Pugh matrices can provide large benefits both by improving the set of alternatives and by facilitating convergence. As a basis of comparison, alternatives to Pugh’s methods were assessed such as using a single summary criterion or using a Borda count. These models suggest that Pugh’s method, under a substantial range of assumptions, results in better design outcomes than those from these alternative procedures.