PROBLEM TO BE SOLVED: To improve productivity while improving a delivery term achievement rate following the actual operation conditions of a factory in the case of manufacturing a product (especially, largely scaled single product).
SOLUTION: Information on an order instruction table, a product master, a process master, a resource master, a resource operation calendar, and a result information table is registered (S1), and initialization of a production plan date is executed (S2). An unallocated job list is created (S3), and an allocation possible calendar in an allocation level set in an order or job unit is created with respect to those jobs (S4). An allocation algorithm is applied to the job group of the unallocated job list, and the allocation of resources is executed under the consideration of the constraint of the resource operation calendar and the allocation possible calendar, and an allocation information table is updated (S5 to S9). On the basis of the allocation information table, whether or not the result of the production plan is satisfied is evaluated (S10), and when the result of the production plan is not satisfied (NG), the allocation level is changed in the order or job unit from the result of the production plan (S11), and when the result of the production plan is satisfied (OK), processing is ended.
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