Abstract: A customer information collection means collects sales information from POS data of a customer, and creates customer count data associating the collected sales information with personal information of the customer. A segmentation analysis means clusters the customer into a segment per lifestyle of the customer via k-means and Ward on the basis of the customer count data. A classification rule creation means creates a rule for uniquely deciding a segment from customer information via a decision tree analysis on the basis of a segment calculation result. A factor analysis means makes a factor analysis of a sales rate of segment-based customer count data, and extracts a characteristic factor indicating a characteristic of a product as a product characteristic/customer characteristic per product group.