DEVICE AND METHOD FOR CALCULATING REQUIRED QUANTITY OF MATERIAL

A material/quantity requirements arithmetic determination system which can ensure enhanced processing speed by uniformizing a load occurring in execution of arithmetic processings and suppressing occurrence of overhead to a possible minimum. The material/quantity requirements arithmetic determination system includes a plurality of material/quantity requirements planning (MRP) arithmetic units disposed in parallel for determining arithmetically types of items, quantities thereof and delivery-appointed terms thereof which are required for manufacturing a predetermined article on the basis of a production schedule of the article. A given one MRP arithmetic unit determines arithmetically a net required quantity of a given item to thereby supply the net required quantity as determined to the other MRP arithmetic units wherein the MRP arithmetic units execute part-based expansion arithmetics in parallel, respectively, for allocated ones of plural child-items which constitute the item on the basis of the net required quantity of the item.