Multi-Objective Simultaneous Satisfaction Design Method, Based on Preference Number

(The distribution of Preference degree of design variable, based on empirical knowledge, directed graph theory, and product usage status)

Abstract

In the multi-objective simultaneous satisfaction design method (set-based design method) based on the preference degree, the distribution of preference numbers regarding the performance as the ability of the function and the design variable as the influential factor have conventionally been based on empirical knowledge. In addition to this, in this study, I investigated a method based on directed graph theory (adjacency matrix and governing matrix) and a method based on the frequency of actual product usage as characteristics of the design variables. In particularly, for the of cases of graph theory and the frequency, the methods expressing the preference distribution are shown using actual concrete examples, that are driving conditions of a car and material properties, respectively.