Patent ID: 8046252

Claim:
A sales plan evaluation support system, comprising: means which obtains master information that includes a sales plan of a product and is used as input for material requirements planning (MRP) calculation; a first MRP calculating means which obtains a first order-placement plan through MRP calculation using the master information as input, the first order-placement plan including an ordered-item count and an order-placement date of a required item for the product; revision timing setting means which sets timing for revising the sales plan; master modifying means which modifies the master information; and a second MRP calculating means which obtains a second order-placement plan through MRP calculation by using an order-placement plan having an order-placement date preceding the revision timing included in the first order-placement plan as an order-placement plan which has been implemented prior to the revision timing, and by using, as input, master information modified by the master modifying means, the second order-placement plan including an ordered-item count and an order-placement date of a required item for the product.