Split valuation in subcontracting process

Hi Gurus,

i have a business scenario i.e

I have a capital item which i will maintain  in split valuation

1.New

2.Repaired

3.Damaged.

i have to send the damaged item to vendor through subcontracting process, in component i will give the same material number.

I have to input  valuation type ( damaged)  against the component how can i do this.

The vendor will repair the item and send back, i have to update it as( repaired).

How can i map the process in SAP.

this is not through refurbishment,there is no PM implemented

have to do it through MM.

Please suggest.