Material Requirement Calculation (Yield, Scrap)

Yield rate and scrap quantity can be specified in the Integrated Master Editor for the Input Instruction and Output Instruction. An input instruction specifies the item and its quantity to be input to the given operation. An output instruction specifies the item and quantity to be output from that operation.

In the order table, order 1 requires to produce 9 items of “AX”.

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You can view order 1 in the Resource Gantt chart.  By looking at the Inventory graph, you will see that 9 items of “AX” are required.

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Please set 0.9 as the yield rate for the output instruction and press the reschedule button.

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As 9 items of “AX” will be supplied to the next process, 10 items of “AX” will be produced and 10 items of “A” will be used. This is because the yield rate is set as 0.9.

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Then, set 1 as the scrap quantity.

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Press the reschedule button and confirm that the required quantity of “A” is increased by 1 to 11.

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Next, let’s set 1 as the scrap quantity for the input instruction and press the reschedule button again.

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The manufacturing quantity of “AX” remains 11 items but the required quantity of “A” was increased to 12 items.

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If we set 0.8 as the yield rate for the input instruction and reschedule it, the required quantity of “A” will change to 15.

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To learn more about Asprova specific to this sample demonstration, you may visit Asprova’s e-Learning videos at http://lib.asprova.com/ (see 24. Scheduling Logic).

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