Subcontracting the same material

Hi,

we use the subcontracting process, one of the main master data needed is the bill of materials, so that the components are defined and shipped to the vendor and the finished product is returned from the vendor. This process works fine, and the costs are charged to the finished products.

question: can we apply the subcontracting process for the same material as component and finished product? I ask because we have now a lot of materials in inventory that have to go to the vendor just for a small process, but the vendor will not return a new material; the vendor will return the same material with a very little adjustment, but we want this little adjustment to be charged to the material (without creating new materials, a lot) and not as a service cost; si, is it possible or how colud we handle it?

Thanks a lot