Defective factor analysis system and defective factor analysis method

摘要

To provide a defect factor analysis system and defect factor analysis method capable of presenting information that appropriately represents features of defect factors even when a distribution of data of good products and a distribution of data of defective products overlap.SOLUTION: A defective factor analysis system creates a frequency distribution of objective variable data for a data set including objective variable data of respective products for an objective variable and explanatory variable data of respective products for plural explanatory variables, designates two extraction areas, which are apart from each other, in the created frequency distribution, and calculates for each explanatory variable a difference between feature quantities representing a difference between explanatory variable data for products whose objective variable data belong to one of the two designated extraction areas, and products whose objective variable data belong to the other of the extraction areas. On the basis of the respective calculated differences between the respective feature quantities, the defective factor analysis system evaluates, as degrees of importance, degrees of relevance of explanatory variables to a defect factor, and outputs a result of the evaluation.SELECTED DRAWING: Figure 3