SCRAP QUANTITY IN ORDER CONFIRMATION

Hi,

When i confirm an order there is a field called scrap quantity. Supposse there is an order for 10 qty. Now while confirming the order i give in the yield field as 10 & 10 in scrap quantity where will it effect...

Will it effect costing of the order.

Can i do like this because my order is for 10 quantity & i am confirming & scarping the same quantity.

Please guide as i want to use the same field..

I am in go live satge.Please help.

regards

jimmy