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If the resource basis is Item, increasing the number of items to be processed at an operation increases required hours. For example, doubling the number of items that require grinding doubles the hours required of a grinder. The relationship between required hours, runtime quantity, and order quantity for Item basis resources is represented by the following formula. In the example, all resources except D1, R1 are item basis resources.
If the resource basis is Lot, increasing the number of items to be processed at an operation does not have an effect on required hours. For example, doubling the number of items that require drying does not double the hours required of a drying room. The relationship between required hours and runtime quantity for Lot basis resources is represented by the following formula. In the Resource Requirements Snapshot Example, D1, R1 is a lot basis resource.
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