Procurement Quantity Calculation
Use
In the procurement quantity calculation the system determines the procurement quantities of receipts, meaning that the system forms lots. The system carries out the procurement quantity calculation automatically, for example:
Features
The system determines the procurement quantities based on a quantity defined by the respective application. During planning with the standard heuristic SAP_PP_002 for
planning standard lots
, the system determines the procurement quantities for a requirement that is not sufficiently covered. When an order is created manually, the desired yield or purchase order quantity is relevant.
In general, the number of receipts and the procurement quantity of each receipt are dependent on the following factors:
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There can be assembly scrap when products are produced in-house. In this case, the procurement quantity of a receipt comprises yield and scrap. (The percentage for the assembly scrap refers to the procurement quantity of a receipt.)
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The lot-sizing procedure determines how the system forms lots, that is, which (partial) procurement quantities and desired availability dates/times the receipts must have in order that they make the desired yield or purchase order quantity available. The lot-sizing procedure adjusts the procurement quantities of the receipts to the production- or planning-technical conditions. Examples are equipment-related production of lots with fixed lot size, or a weekly purchase order of components required in the following week, which is dependent on purchase order conditions (period lot size).
Additional parameters such as minimum lot size , maximum lot size , and rounding .
You can use these parameters to model constraints for the permitted procurement quantities of an individual receipt. The lot-sizing procedure determines which of these parameters the system can consider during the procurement quantity calculation.