RE: Scrap factor in Bill of Materials
At the component level in GP on the Bill of Material Card, you can associate a shrinkage factor. If you are maintaining tons of Bills of Materials you can use WilloWare's BOM Import Utility.
Here is an excerpt from the GP Documentation on how to configure default shrinkage factors for items.
Shrinkage for bill of materials components:
When you enter or select an item to add to a bill of materials, the default shrinkage percentage for the item typically comes from the Item Resource Planning Maintenance window. However, different rules apply if the replenishment method for the item is Make or if the item is a phantom item. Refer to the following table for more information.
Replenishment Method
Default shrinkage percentage
Buy
Comes from the Item Resource Planning Maintenance window.
Make
No default shrinkage percentage is supplied.
Make or Buy
A message appears when you add a make or buy item to a bill of materials, and you’ll have the option to select the bill of materials type for the item.
If you choose Yes—if quantities of this item should be made—you’ll need to select a bill of materials type. If you choose Phantom, the default shrinkage percentages for the components of the phantom item will come from the Item Resource Planning Maintenance window.
If you choose No—if quantities of the item should be purchased—no default shrinkage percentage is supplied.
Regardless of the default shrinkage percentages, you can change them in the Shrink % field for each component, if needed.