It is an object of the present invention to improve analysis accuracy of
manufacture data with missing values. First, an analysis target
explanatory variable is selected. The manufacture data acquired from each
process is separated into a set with missing values and a set without
missing values. An evaluation value for evaluating the influence of the
explanatory variable on the objective variable is calculated from the
manufacture data in the set with missing value and the set without
missing values. The manufacture data is analyzed by matching the
calculated evaluation value with a reference.