Material Requirements Planning with MRP Areas 

Implementation Options

This process contains technical information on how the planning run works with MRP areas. The process is to a great extent the same as the planning run at plant level.

Process Flow

  1. The system checks in the planning file whether a planning file entry exists for the material in the MRP area that is to be planned.
  2. The system calculates net requirements for the material in the MRP area. During this calculation, the system checks whether the requirements that exist for the MRP area can be covered by the available stock in the MRP area and the planned receipts for the MRP area. If there is a shortage of stock, the system creates a procurement proposal for the MRP area.
  3. The system calculates procurement quantities. If you have defined a lot-sizing procedure in the MRP area segment of the material master, the system calculates using this lot-sizing procedure.
  4. The system carries out scheduling using the parameters defined in the MRP data of the material master.
  5. The system determines the type of procurement proposal for the MRP area on the basis of the procurement type that is defined in the material master (see also Determining the Procurement Proposal). You can also have Delivery Schedules created for the MRP area of a material.

If you have defined a different special procurement type in the MRP area segment, the system creates the corresponding procurement proposal, for example, stock transport requisitions for the special procurement Stock transfer from plant to plant.

 

With the special procurement keys, which are entered into the MRP area segment, the material requirements planning for the MRP area only takes into account the settings for special procurement types that do not refer to the BOM explosion.

The settings for stock transfer are taken into consideration, for example, in contrast to the special procurement key Phantom assembly, which refers to the BOM explosion.

  1. For every procurement proposal for an assembly, the system explodes the BOM and determines the dependent requirements.

In order for the system to be able to determine requirements at MRP area level, you must ensure that the storage location determined during the planning run is the same as the storage location that is defined in the MRP area (see Determining and Assigning Storage Locations to the MRP Area).

 

If you have entered an MRP group in the MRP area segment, the system uses the parameters that are defined in the MRP group during the planning run. The only exceptions to this are: the strategy group, the parameters for the consumption mode and period of adjustment and the checking rule for dependent requirements in the case of the availability check. Even if you have defined these parameters in the MRP group, the system still uses the parameters from the MRP data of the material master.