Product Design Based on Concurrent Processing of Design and Manufacturing Information by Utility Analysis

Abstract

A methodology for concurrent decision making of factors concerning product designs and product manufacturing is proposed for ob taining better product designs from a wider global viewpoint of the product performance and the product manufacturing cost according to the concept of concurrent engineering In this method first a function expressing the satisfactory level of the manufacturing division and a function expressing the satisfactory level of the design division are formulated for the product design being regarded Then an integrated higher ranking decision making utility function is formulated using these two satisfactory level functions by the utility analysis Next Pareto optimum solution sets of the two multiobjective optimization problems of maximization of the product performance and minimization of the product manufacturing cost are obtained for alternative product designs Finally on the Pareto optimum solution curves the values of the integrated satisfactory levels are obtained and the most preferable design solution is selected An applied example of this concurrent design procedure is given to demonstrate its effectiveness in comparison to a conventional design procedure Key Words: concurrent engineering design optimization product design util ty analysis multiobjective optimization concurrent design satisfactory function product performance manufacturing cost

A Parametric Mixed-Integer Optimization Algorithm for Multiobjective Engineering Problems Involving Discrete Decisions

“…Reviews of multicriteria engineering optimization problems and solution approaches can be found in Clark and Westerberg (1983) and Sawaragi et al (1985). Most recent systems engineering applications of multiobjective optimization methods appear in process design and control (Meadowcroft et al, 1992;Luyben and Floudas, 1994), waste treatment (Ciric and Huchette, 1993;Ciric and Jia, 1994), and concurrent process and product design (Yoshimura and Kondo, 1996).…”

On the Tradeoff Control to Concurrent Product and Process Design

“…Yoshimura et al [ 18] presented a multiobjective optimization approach for concurrent design and demonstrated their scheme by applying it to the design of a cylindrical coordinate robot. Afterwards, his team developed a methodology for concurrent decision making in which a satisfaction function is defined and used as a design link to quantify the role of product and process in integrated design [ 19]. They applied utility analysis to combine multiple design attributes indicating product and process concerns to a single one by which a design solution can be readily attained using any single-optimization technique.…”

Product Design Optimization Method Considering the Integrated Satisfaction Level

“…The SQC (statistical quality control) method is used to evaluate variations in characteristics and reduce their magnitude, but this method only considers characteristic variations. Concerning the evaluation of satisfaction levels for product designs, Yoshimura and Kondo [14,15] have proposed a group decision making method for product design using the concept of group satisfaction, or utility.…”