If you selected Allow over/under allocations on the Allocation or Build tab in the BOM Settings, you can change the component quantities required for the BOMs when you allocate or build BOMs.
Open: Bill of Materials > Processing > New Allocation or Bill of Materials > Processing > Record Built Items.
The Edit Component window appears.
The quantity must be valid for the unit of measure. If not, the quantity value entered is rounded to the nearest valid quantity.