INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND RECORDING MEDIUM WITH PROGRAM STORED THEREIN

This information processing device 10 is provided with a product quantity estimating unit 14 (detecting means) and a wait time estimating unit 18: the product quantity estimating unit 14 detects the number of shopping baskets held by people lined up at a product registration device (POS device); the wait time estimating unit 18 calculates a wait time prediction value for each product registration device on the basis of the number of shopping baskets; the product quantity estimating unit 14 detects the shopping baskets, and estimates the quantity of products held by each person lined up at each product registration device; the wait time estimating unit 18 calculates the wait time prediction value for each product registration device on the basis of the quantity of products held by each person lined up at each product registration device.