Abstract: A product rationalization system and method for automatically and objectively determining products sold by an account that are candidates for deletion from the account's inventory includes a memory and a processor communicatively coupled to the memory. The processor has means for associating account data and the product attribute data, where the account data includes an account sort measure for each product of a plurality of account products. Each product identifier of the product attribute data identifies its respective product with a product group consisting of a cluster of products that are considered substitutes for each other. Upon sorting the associated data for the products by product identifier and by account sort measure, a product of each group of products that are considered substitutes is determined to be a candidate for deletion from the account's inventory.