In info record vendor should be maintained as subcontractor.
Vendor (Subcontractor) receives the components used to manufacture a finished
product directly from your company or through third party.
Your company should place a purchase order for the finished product. In
this manually you can enter the required individual components or it can be
determined via the explosion of BOM (if exists).
Stock check at vendor level: ME2O
Company stock check: MMBE
GR for individual components through movement type: 501 or 561 (if with out
PO or without reference).
GI to subcontracting vendor: through movement type 541.
GR from sub contracting vendor: through movement type: 101
Movement type 543 is displayed to cancel the material cost account.
If the subcontracting order has to be generated through materials
planning,the special procurement key has to be set in MRP 2 screen.