Study on Product Development Method by Design Navigation Method (Process in Consideration of Interaction Effects among Design Parameters)

Design parameters of industrial products are usually decided by testing some prototypes . The reduction of the number of prototyping and experiments leads to the short lead-time and low cost . Design Navigation Method (DNM) has been proposed to optimize the parameters that have complex relations to multiple evaluation items. DNM is built on the experimental design method and the information integration method, which evaluates multiple evaluation items with a unified criterion as the amount of information. However, DNM has not considered interaction effects among design parameters. In this paper, the problem in case that interaction effects are significant is discussed, and a modified-DNM is proposed as an analysis method in such case. As a case study, the modified-DNM is applied to a design problem of an electric circuit. Through the case study, it is confirmed that modified-DNM calculates optimized design parameters holding balance of multiple evaluation items although interaction effects are significant.