Device and method for calculating required quantity of material

A material/quantity requirements arithmetic determination method for determining arithmetically types of items, quantities thereof and delivery-appointed terms thereof which are required for manufacturing a predetermined article based on a production schedule of said article with the aid of a plurality of arithmetic means, wherein said material/quantity requirements arithmetic determination includes a processing for arithmetically determining a net required quantity of an item constituting said article, a processing for executing a child-item-based expansion for a child-item by using the net required quantity when said article is constituted by child-items, said method comprising:

• arithmetically determining said net required quantity of said article with a first arithmetic means of said plurality of arithmetic means;
• outputting said net required quantity determined arithmetically to another one of said plurality of arithmetic means;
• executing child-item-based expansion of an item allocated to said another one of said plurality of arithmetic means by said another one of said plurality of arithmetic means by using the net required quantity output from said first arithmetic means;
• and
• arithmetically determining a net required quantity of the item undergone said child-item-based expansion.

A computer-readable recording medium storing a program of a material/quantity requirements arithmetic determination method for determining arithmetically types of items, quantities thereof and delivery-appointed terms thereof which are required for manufacturing a predetermined article based on a production schedule of said article with the aid of a plurality of arithmetic means, wherein said material/quantity requirements arithmetic determination includes a processing for arithmetically determining a net required quantity of an item constituting said article, a processing for executing a child-item-based expansion for a child-item by using the net required quantity when said article is constituted by child-items, said material/quantity requirements arithmetic determination method when executed by a computer causes the computer to perform said method comprising:

• arithmetically determining said net required quantity of said article with a first arithmetic means of said plurality of arithmetic means;
• outputting said net required quantity determined arithmetically to another one of said plurality of arithmetic means;
• executing child-item-based expansion of an item allocated to said another one of said plurality of arithmetic means by said another one of said plurality of arithmetic means by using the net required quantity output from said first arithmetic means;
• and
• arithmetically determining a net required quantity of the item undergone said child-item-based expansion.