Using the MRP area, you can plan the provision of components for individual subcontractors separately from the usual requirements (see also Subcontracting).

• You have created an MRP area for the subcontractor X in Customizing and have entered the vendor number of the subcontractor there.
• You have assigned the components to be provided to the MRP area for the subcontractor X by creating an MRP area segment in the material master record of the components to be provided.
• You have entered the special procurement key Stock Transfer from Plant to MRP Area or the special procurement key for external procurement in the MRP area segment, if you directly procure the components to be provided using subcontracting/third-party purchase requisitions.
• You have entered the special procurement key for subcontracting in the material master of the assembly that the subcontractor produces.
• You have created a source list entry for the assembly that the subcontractor produces. In this, you have entered the subcontractor as a fixed vendor and have set the indicator 1 for relevant to MRP in the MRP field (see also Determining Source of Supply for External Procurement).

• stock transfer reservations from the plant to the provision stock of the subcontractor (see Stock Transfer of Components to be Provided) or
• planned orders or purchase requisitions within the subcontracting/third-party order processing (see Subcontracting/Third-Party Order Processing).