Monty - appreciate your reply. I am really at a tough spot.
The system is just not constraining in the manner we need. So far, we can get the planned jobs to honor the 1st material receipt date (so no jobs get planned to start before that date). But, after that, all bets are off. The system just keeps planning jobs as if there is an endless supply of material. Time phase for the constrained item goes waaaaaay negative.
We’re paying some serious cash to an Epicor consultant (through Epicor) to resolve this. I am of the opinion that material constraint does not work properly in our version (V8, incidentally). That would be a significant problem for our implementation, as material lead time is the majority of our product lead times.
Here’s hoping that I am wrong, and I’ve overlooked something. I have read the entire MRP and Scheduling technical references, and cannot find anything that I might be doing incorrectly.
Hence my original question - has anyone ever successfully seen material constraint function as expected?
Edit - We worked around the parent/child job thing by selecting the “pull as assy” switch on the lower levels. That resolved the issue with different BOM levels not planning appropriately.