Return order item management

[Anurag Walia]

First of all thanks for giving your time.

I have done lots of thing with order management.
but still i am confused with the order item returning.
There is any process in which i can manage or reduce reduce the item returned.

example :
if i generate a purchase order of 10 product for selling but i am not able to sell 3 product i returned 3 products back. then how i will manage my purchase order before receiving or after receiving.

Thanks
Anurag Walia