Quality analysis device and quality analysis method

A quality analysis method, comprising:

• acquiring quality data indicating a state of an object subjected to quality analysis and apparatus-information data indicating information of an apparatus that handles the object subjected to quality analysis;
• setting data items of data to be counted up, a base condition indicating a condition that constitutes a basis of the quality analysis, and a comparison condition indicating a condition subjected to the quality analysis, with respect to the quality data and the apparatus-information data acquired in the data aggregation step;
• and
• extracting from the quality data and the apparatus-information data acquired in the data aggregation step, data that meets the base condition and data that meets the comparison condition, for each data item set in the condition setting step, and calculating frequency distributions of these data for each of the data items, and outputting data indicating a degree of divergence for each of the data items between the frequency distribution of the base condition and the frequency distribution of the comparison condition.