stock at supplier end or sub contracting process

Hi all,

we having bottles 1000 qty in our inventory we are subcontracting to supplier and sending 100 qty.

here onhand 900 qty to my inventory and other 100 to display at vendor side so, however my total onhand display as 1000.

once the supplier done repair work on 100 and he backs to our inventory for this he will charged as service.

Please provide your valuable inputs to achieve this requirement in oracle with steps or share documents that will help me a lot.

Thanks in advance.

Regards,

Rajendar.