Patent ID: 8392412

Claim:
A computer-readable, non-transitory storage medium storing a program for causing a computer to execute a procedure, the procedure comprising: classifying a plurality of sampling points, each having plural types of performance item values, into a plurality of ranks, based on the performance item values, so as to satisfy a condition, wherein the condition includes a first condition that sampling points belonging to the same rank are not dominated each other, and a second condition that a sampling point belonging to a certain rank is not dominated by another sampling point belonging to a rank higher than the certain rank; determining, in ascending order from a lowest rank to a highest rank among the plurality of ranks, whether or not a first sampling point belonging to a first rank dominates a second sampling point belonging to a second rank higher than the first rank; and upon detecting the first sampling point dominates the second sampling point, carrying out a processing while changing the rank from a rank immediately lower than the first rank to the lowest rank, wherein the processing comprises: adding the first sampling point and sampling points included in a first dominating source set of the first sampling point to a second dominating source set of the second sampling point, wherein the first dominating source set includes the sampling points dominating the first sampling point, and the second dominating source set includes sampling points dominating the second sampling point; and excluding the first sampling point and the sampling points included in the first dominating source set of the first sampling point from sampling points for which the determining is carried out with respect to the second sampling point.