ORACLE SCM INVENTORY - Things about Reservation

1. We are unable see available to reserve quality for item in material workbench though it is showing available quantity 

Ans: Sub inventory might not be under allow reservation. Please make it allow reservation then we can see the available quantity in material workbench 

2. When checking item stock in material workbench there is showing available stock ( 10 qty) but showing available for reservation and available for transaction as 0, where could we can check those stock ?

Ans: 

1. Check pending transactions there we can see reserved stock

2. Check reservation screen for the item there you can see reserved stock

3.Check supply /demand screen there you can see reserved stock 

If stock exist in pending transaction for closed sales orders ? Then consider that as orphan transaction ( which is not linked to any of open demand ) we need purge/ delete those transactions from pending transactions. So stock can be available for reserve after removing orphan transactions from pending transactions