PROBLEM TO BE SOLVED: To select a supplier and a supplier who can select a supplier in consideration of not only whether the manufacturer of a product ordered from a business partner is handled but also the place where the product is received by the business partner. The challenge is to provide a method and a supplier selection program. SOLUTION: In this embodiment, (1) a department code associated with a person in charge code included in order data is acquired from a person in charge master including a person in charge code and a department code, and (2) a product number code and a manufacturer. Obtain the manufacturer code associated with the product number code included in the order data from the product number master including the code, and (3) from the supplier master by manufacturer and department including the department code, manufacturer code, and supplier code. Acquire the acquired department code and the supplier code associated with the acquired manufacturer code. [Selection diagram] Fig. 6
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