抄録
This paper develops a new parameter design method of improving quality of products with multi objective characteristics. Optimal levels of control or signal factors can not be determined uniquely by trivial extensions of conventional parameter design methods for single characteristic. A loss function is introduced to unify the multiple characteristics via unification of mean and variance of each objective characteristic. A minimization problem of the loss function is formulated as an unconstrained nonlinear programming, and the optimal parameter levels are determined successfully.
