To determine assignment objects suitable to actual conditions for arrangement information.SOLUTION: The assignment object determination device 10 determines bases having good evaluation values among a plurality of bases as assignment objects in an order of higher priority for a plurality of pieces of arrangement information for requesting arrangement of products. As for a plurality of pieces of arrangement information having the same priority, the assignment order determination device 10 determines as the assignment objects, bases having good evaluation values among the plurality of bases for the arrangement information in an order of difficulty in substituting the assignment objects calculated on the basis of the evaluation values.SELECTED DRAWING: Figure 1
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