There are times when an ECN effectivity says to use up existing parts before using the new parts (Use to Exhaustion). In Dynamics NAV, we have the option to phase in using “starting dates” and “ending dates” in Production BOM’s, but that is based on an estimated usage rate that may not be accurate.
There is a trick that will aid in planning for the new parts and using up the old parts. This trick may not be useful in a large company with rigid ISO procedures, but will work great in smaller companies.