PROBLEM TO BE SOLVED: To quantitatively search for a numerical condition of each design parameter of a structure, satisfied by the structure having desired performance balance.;SOLUTION: This data analysis program makes a computer execute steps: of clustering a data set based on one data group to classify it into a plurality of clusters, and imparting identification data according to the classified cluster to each the data class; and of searching for the numerical condition of each of values constituting the other data group, to be satisfied so as to classify the data set one stage or above according to a combination of the values constituting the other data group and to divide it into a plurality of partial data sets corresponding to the cluster. In the step of searching the numerical condition, the numerical condition of each of the values constituting the other data group, necessary to reduce unevenness of the identification data in the data set after the classification as compared to unevenness of the identification data in the data set before the classification is obtained in each the stage of the classification.;COPYRIGHT: (C)2009,JPO&INPIT
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