| 摘要 |
An MRP explosion portion calculates the amount of common and optional parts necessary for producing a forecasted sales amount of products. An amount correlated with actual results of received product orders is added to the amount of optional parts. The delivery amounts are added to stock amount parts data corresponding to the shared and optional parts. If a required amount of products is accepted, an MRP implosion portion assigns shared and optional parts to the required amount of products, and subtracts the amount of the assigned common and optional parts from the stock amount parts data. Then, with respect to each kind of product, an excess amount of common parts is assigned. The amount of products of the kinds to which the excess amount of common parts has been assigned are as the amount of products of the kinds for which additional orders can be received.
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