RELIABILITY ANALYSIS DEVICE, RELIABILITY ANALYSIS METHOD, AND RELIABILITY ANALYSIS PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a reliability analysis method supporting, during reliability analysis for a multipurpose design, the optimization of the multipurpose design by use of a plurality of design margins (reliability indexes) and each correlation degree between defective mode as indexes or the clarification of the causal relation/correlation hidden between the plurality of design margins or each correlation degree between defective modes and each design variable.;SOLUTION: This reliability analysis method comprises steps of calculating reliability indexes β_i (i=1-m) for m defective modes corresponding to m specs (S103); calculating each correlation degree r_ij (i, j=1-m, ij) between defective modes by use of each overlapping degree of spec limit curved surface (S103); performing a design optimization using each correlation degree between reliability index and defective mode (S104); and analyzing the causal relation/correlation by means of a structural equation modeling using each correlation degree between reliability index and defective mode as a parameter (S105).;COPYRIGHT: (C)2005,JPO&NCIPI