Hi Debasis,
SAP_PP_002 uses Net Requirements Calculation method "Avoid Surpluses" - I assume you're using this one. In this case, Net Requirements Calculation follows logic below:
- Demands which are in the past or within the Planning Time Fence consume receipts which are in the past or within the Planning Time Fence
- Demands which are in the future consume receipts that can cover them on time
- The remaining receipts (if any) consume the remaining demands even if they cannot be covered on time, starting from the latest demand to the earliest demand
Given this, if there are PP-Firmed planned orders in the future (after Current Date and Time + Planning Time Fence), these receipts will first be assigned to demands which can be covered on time. They will only be assigned to past demands if there is some quantity left in them when step 3 is reached.
As a result, the heuristic may create new receipts as early as possible in the horizon to cover the shortages from the past.
Options in this case are:
- Change Net Requirements Calculation method from "Avoid Surpluses" to "FIFO"
- Assign in the Product Master, Demand tab, Pegging subtab, an Alert Threshold for Lateness, as per KBA 2010195
>> The Alert Threshold for Lateness from the Product Master only affects Net Requirements Calculation. It will not impact Reuse Mode "Delete unfixed Receipt Elements".
Regards,
Tiago