To provide a new scheme capable of constructing a stable supply chain by reducing dependence on experiences and skills of a person in charge.

The scheme targeting a supply chain composed of at least two of a product planning (scheduling) phase, a manufacturing preparation (design) phase, a manufacturing phase, a delivery (distribution) phase and a sales phase comprises an initial setting means to determine the number of products assigned to stores in response to capacities of each store and initially set product management information to include the number of products, an update means to update the product management information by adding or modifying product data on products assigned to the stores to the product management information set to the stores and an input/output means to output reference information at predetermined phases based on the product management information set to the stores and/or receive information to update the product management information.