subcontracting..

hi friends..

My client sends an asset or capital goods out of company premises for repair with 57FS challan,

we r not providing any other spare parts with this, the vendor replaces whatever is broken down and sends it back, with the same challan and invoice which includes service charges,

what is this process called, is it called as subcontracting or anything else.

how to map this scenerio in SAP..

waiting for ur valuable answers..

thanks in advance...