MRP design for Service Spare Parts

Hello,
I am in process of designing the MRP run for service spare parts for construction and mining equipments business. There is a central warehouse and small depots.
Help me out to design following MRP requirements.
1.     MRP process is expected to consider stocks at all these locations i.e central ware house and depots. Optimization across locations and stock transfers to be considered.
2.     MRP process is expected to consider open PO requirements.
3.     MRP process is expected to consider in-house service orders reservations requirements.
4.     MRP process is expected to consider open sales spare parts order demand from dealers.
5.     Certain formula base forecast requirements for specific spare part
If SAP standard solution is there or any work around is expected.
Regards
Sanjeev Dhavan

1. MRP process is expected to consider stocks at all these locations i.e central ware house and depots. Optimization across locations and stock transfers to be considered.
- MRP can be run for a whole plant or single material or MRP area(group together some storage location). I hope your warehouse is a plant so you can run the MRP at your plant(ware house) level.
2. MRP process is expected to consider open PO requirements.
- You should use consumption based planning but you need to identify what type of MRP you want to use.
    - reorder point planning     - forecast based planning      - time phased planning
    - in general all the above MRP will consider the open PO / PRs
3. MRP process is expected to consider in-house service orders reservations requirements.
-  this is possible by selecting proper MRP type, for ex. if you want to use reorder point planning, then you should use V1(Reorder point planning with external requirements) which includes sales order and manual reservation in net req calculation.
4. MRP process is expected to consider open sales spare parts order demand from dealers.
- Refer point 3
5. Certain formula base forecast requirements for specific spare part
- do you want to use forecast based MRP? what formula you want to use?

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