I can't think of any way to do it in one process at this point. Our BOMs are initially set up with whatever scrap percentage we calculate for that particular part. However, it's more for estimating than anything, since we don't backflush - we account for the amount actually used for the job. If there are fall-offs that we think we can use, we don't count them as used for the job. If we think we may, or think it unlikely, we count them as used, and then they're "free" if we do use them.