PURPOSE: To automatically execute quantity type planning by providing a resource selecting part, a quantity selecting part, and an allocation control part, etc.

CONSTITUTION: This device is constituted of an input part 1, a task selecting part 2, a task selecting means group 5, the resource selecting part 3, a resource selecting means group 6, the quantity selecting means 4, a quantity selecting means group 7, the allocation control part 8, and an output part 9. The selecting part 2 determines a task to be selected based upon a task selecting means applied from the group 5. The selecting part 3 determines a resource to be selected based upon a resource selecting means applied from the group 6. The selecting part 4 determines quantity to be selected based upon a quantity selecting means applied from the group 7. The control part 8 executes allocating processing for executing respective selecting parts based upon data applied from the input part 1 in accordance with applied allocation order and allocating the quantity of the determined task to the resource. A planning result calculated by the control part 8 is displayed on the display part 9.