The components that are provided to the subcontractor are managed as stock provided to vendor. Components in a subcontract order that are consumed can only be debited from the stock of the material provided to the particular vendor.
Components can be provided to a vendor as follows:
The transfer posting can be made without referencing a purchase order. Alternatively you can provide vendors with the components required for existing purchase orders.
See also:Providing Components With No Order Reference Providing Components for Existing Purchase Orders
This involves you ordering the components from a second vendor which you require for the subcontractor.
See also:Providing Materials From Another Vendor