Can we use MRP to plan for FERT in-house produced with PIR's & has Min/Max

Question

Hi SAP Guru's
I have a very critical issue from the client who wants to use MIN/ MAX stock values for planning its finished products (in-house produced)
<b>here is the details of the scenario</b>
Client recieves 2 Excel files every week from customer
<b>1st</b> file contains the Weekly Demand Forecast of FERT material for next 1 year and they upload it in MD61 as PIR's <u><b>BUT</b></u> this value is also <u><b>Inclusive</b></u> of Safety stock value (<b>ex: if weekly demand entered in MD61 as PIR is 50 and if safety stock value is 10, then actual demand is only 40)</b>
<b>2nd</b> file send contains only <b>safety stock values</b> (for ex in this case let it = <b>10</b>) to be maintained for the FERT materials
the client wants MRP to plan and trigger based on this PIR's in MD61 and Safety stock level fand plan for FERT, HALB and also ROH materials as defined in the BOM also taking into consideration the current WIP levels (Work in progress for any existing production orders currently being processed) based on the production Lead times values maintained
so what the client wants is they want to maintain 2 stock values, that is one least stock value and other higher value which if stock falls below this point, will trigger production based on the lead time and considering any WIP levels also
<b>(for ex in this case if PIR = 50 and safety stock is 10, MRP run result client wants is = 30 and NOT =40)</b>
so here are my questions
1. is this scenario feasible? use safety stock and min/max level for in-house produced finished which has demand PIRs in MD61 at the same time?
2. Also due to SOX complaince regulations, the client does not want to change the forecast values in MD61, so is it possible to make some settings so that forecast is corrected by WIThOUT including the safety stock value in it? ( for ex: in this case as = 40 only and NOt as 50)
3. which all settings should i maintain like for MRP type or lot size or stock qty levels or anyother customizations if any required so that when we run MRP, can it ignore the safety stock value and generate the client desired output?
thank u verymuch for your time & expert advice in advance

Answer 1

Hi Chakri,
This is not possible as per standard functionality. MRP always creates proposals for the shortage quantity of the safety stock. We have used the user exit in the plant level MRP run to exclude both plant and safety stock in the net requirements calculation.
You have to write logic to convert the safety stock into plant stock in the user exit so there will be no additional procurement proposals...you can create custom indicatar in materail master or linked any existing indicator like MRP group to the user exits so the MRP will checks this and will not create proposals for the selected parts.
If you have any questions then please inform.
Regards
TAJUDDIN