Method and device for computing material requirements
First Claim
1. A material requirements computing device comprising:
- production plan reading means for reading a production plan of a product;
plural parts computing means for subjecting the constituent parts of said product to an expansion computation;
means for relating each of said plural parts computing means with each of said constituent parts; and
network forming means for forming a network by mutually connecting said plural parts computing means according to the relationships between said constituent parts of said product;
the highest one among said plural parts computing means forming said network, executing an expansion computation according to a read status of said production plan which is read by reading means;
the remaining parts computing means except the highest one among said plural parts computing means forming said network, executing an expansion computation according to the progress of the expansion computation of the upper parts computing means based on the connection relationship of said network.
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Abstract
A method or device for computing material requirements which calculates various parts and materials necessary for products to be produced when a production plan is input, in order to reduce the processing time for a material requirements computation. In order to establish the object, the method or device of computing material requirements is provided, which can perform a parallel process without using conventional low level codes. Parts computing means are respectively assigned to items. When the lower parts computing means receives the computation result of the upper parts computing means, it independently executes the computing process if the computation result is sufficient for the parts computation. The process rate of the material requirements computation can be improved by performing the load distribution under a fixed rule, including that to which computer the data of an item is loaded or by which computer an item is processed, when the material requirements are computed in parallel process using plural computers.
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Citations
24 Claims
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1. A material requirements computing device comprising:
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production plan reading means for reading a production plan of a product; plural parts computing means for subjecting the constituent parts of said product to an expansion computation; means for relating each of said plural parts computing means with each of said constituent parts; and network forming means for forming a network by mutually connecting said plural parts computing means according to the relationships between said constituent parts of said product; the highest one among said plural parts computing means forming said network, executing an expansion computation according to a read status of said production plan which is read by reading means; the remaining parts computing means except the highest one among said plural parts computing means forming said network, executing an expansion computation according to the progress of the expansion computation of the upper parts computing means based on the connection relationship of said network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A material requirements computing method by which a material requirements computation is executed based on a production plan of an arbitrary product, comprising the steps of:
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a step of judging the constituent parts of said product and the relationships between said constituent parts, based on said product production plan; a step of assigning a parts computing unit which subjects said constituent parts to a parts expansion computation; and a step of allowing said parts computing unit to send its expansion computation result to the corresponding parts computing unit and then to execute the expansion computation when said expansion computation result is received from said corresponding parts computing unit, on the condition that said computation result includes data necessary to execute its expansion computation.
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10. A material requirements computing method by which a material requirements computation is executed based on a production plan of an arbitrary product, comprising the steps of:
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a step of judging the constituent parts of said product and the relationships between said constituent parts, based on said product production plan; a step of assigning a parts computing unit which subjects said constituent parts to a parts expansion computation; a step of connecting said parts computing unit according to relationship between said constituent parts of said product; and a step of allowing said parts computing unit to send its expansion computation result to the parts computing unit connected and then to execute the expansion computation when said expansion computation result is received from said parts computing unit connected, on the condition that said computation result includes data necessary to execute its expansion computation. - View Dependent Claims (11, 12, 13)
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14. A material requirements computing device in which plural requirements computing units performs a material requirements computation, comprising:
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a MPS reading unit;
a shared item assigning unit; and
an expansion computing unit assigned to each the requirements computing unit;said MPS reading unit reading an item included in a production plan, deciding a requirements computing unit assigned to each item, and reporting the result to the expansion computing unit corresponding to the requirements; said shared item assigning unit deciding a requirements computing unit assigned to an item reported from said expansion computing unit, and then reporting the result to an expansion computing unit corresponding to said requirements computing unit; said expansion computing unit assigning an item reported from said MPS reading unit or said shared assignment unit in a requirements computing unit corresponding to itself; said expansion computing unit executing an expansion process in which an item corresponding to a child item assigned in a requirements computing unit corresponding to itself, reporting plural shared items among items corresponding to child items confirmed by said expansion process to said shared item assigning unit, and assigning items not shared to a requirements computing unit corresponding to itself. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A load distributing method in a material requirements computation of determining a load distribution when plural material requirements computing units perform in parallel a material requirements computation, comprising the steps of:
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a step of determining a requirements computing unit assigned to each item by reading items included in a prepared production plan; a step of performing an expansion process which confirms an item corresponding to the child of the item; a step of assigning an item not shared with other items among items corresponding to said child to said requirements computing unit; and a step of assigning said shared items to one of the requirements computing units assigned to items corresponding to the parent. - View Dependent Claims (24)
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Specification