PROBLEM TO BE SOLVED: To determine appropriate ordering information. When ordering information including a plurality of items and their respective quantities of the plurality of items is received, the maximum loadable capacity of a vehicle determined based on the ordering information and the plurality of items included in the ordering information. Based on the information on the volumes of the plurality of ordered products corresponding to, it is determined whether or not the vehicle has a surplus loadable capacity, and if it is determined that the vehicle has a surplus loadable capacity, the plurality of ordered products Of the items that can be arranged at the first point to be loaded on the vehicle, and the items that can be arranged at the first point based on the inventory status at the second point, the items to be loaded in the surplus loadable capacity. The quantity of the item is determined, and the determined item and the quantity of the item are output. [Selection diagram] Fig. 1
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