Abstract: This invention relates to a production planning system that judges whether or not production can be carried out in accordance not only with a request from a sales side and a demand forecast but also with a production request number or a maximum producible number of sets for each product. In the invention, production request number information of products, parts list information and information about inventory and inventory schedule of each of parts are accepted. When a calculation processing unit calculates a material necessary amount and makes a production plan of the product, it makes the production plan setting a production infeasible number as a new necessary number to a date later than a date designated by the production request information if any production infeasible number of sets exists. Surplus parts information not linked with the production plan is generated and a production addable number is calculated for each product.

Abstract: 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.

Abstract: This invention relates to a production planning system that judges whether or not production can be carried out in accordance not only with a request from a sales side and a demand forecast but also with a production request number or a maximum producible number of sets for each product. In the invention, production request number information of products, parts list information and information about inventory and inventory schedule of each of parts are accepted. When a calculation processing unit calculates a material necessary amount and makes a production plan of the product, it makes the production plan setting a production infeasible number as a new necessary number to a date later than a date designated by the production request information if any production infeasible number of sets exists. Surplus parts information not linked with the production plan is generated and a production addable number is calculated for each product.

Abstract: The system and method accepts the inputs of an aggregate (long-range) production plan draft, a profit and loss target, a sales target, and a stock target. Then, the accepted long-range production plan draft is deployed into master production schedule and then a feasibility of the long-range production schedule draft is simulated. Based on the simulated result, the system and method calculates an amended schedule, a predicted profit and loss, and predicted sales of the long-range production schedule draft. Further, a supply schedule is calculated on the middle-range production schedule draft deployed from the long-range plan draft. Based on the supply schedule, the middle-range production schedule draft, and a planned buying unit price, the system and method calculates a predicted stock, an estimated loss of inventory price decline, and a planned acquisition cost of inventory. Each calculated prediction data item is displayed on screen.