Material Request does not include current stock qty

Hi,
material request does not include current stock qty in calculations for item from BOM.
Eg.: Item A has 10pcs on stock(not reserved). Item A is part of BOM(1pcs). If I make material request for 2pcs based on that BOM, I’ll have to order 2pcs of Item A, even it has 10 un reserved pcs at stock.
How to include current stock qty in material request calculations? Thanks

Anyone?