On the Tradeoff Control to Concurrent Product and Process Design

Abstract

Concurrent product and process design may be modeled as a generalized two-objective optimization problem. The first objective characterizes "product design" with. the aim of best enhancing product functionality, while the second objective corresponds to "process design" with the aim of minimizing overall manufacturing costs. However, these performing goals may be mutually conflicting in arriving concurrently at their respective optima, therefore, design tradeoffs must be settled in order to achieve a best compromise design. In this work, an adaptive tradeoff parameter, λ(0 ≤ λ ≤ 1.0), is introduced to adaptively control the progressive design tradeoffs between the two performing goals by calibrating the tradeoff parameter & l a m b d a ; over the interval of 0 to 1.0 A fuzzy control scheme is proposed to control the iteration-based design tradeoffs with concurrent design progression for an optimal compromise selttlement in design. Three design models are presented to accommodate different tradeoff scenarios in concurrent design. The proposed approach is illustrated through the case study of a welded beam design.Key Words: concurrent product and process design, progressive design tradeoff, adaptive design control, fuzzy control, multiobjective optimization *For bremty, &dquo;concurrent design&dquo; is used to mean &dquo;concurrent product and process de-sign&dquo; m the rema~nmg sections Volume

Modeling Concurrent Product Design: A Multifunctional Team Approach

“…In addition. Chen ( 1998Chen ( , 1999 proposed a fuzzy control approach to cope with tradeoff adjustments in the coordination of design computing.…”

“…Compared with the non-cooperative team inodel, this model allows a compensative tradeoff among the teams. A team with higher satisfaction is dictated to compensate on the other teams with lower grades of satisfaction (Chen, 1998), thus enhancing the unified overall satisfaction. The Pareto optimality of these design solutions has been proved in Dhingra and Rao ( 1995).…”