I know at one time getting too many suggestions for some parts with a "days of supply" specified.
I don't remember the details though.
I might put a fresh copy in my test database and try MRP with different master file settings.
Kind of tedious to set up & keep re-running MRP but has helped me solve some puzzles like this.
Thanks for your reply. I have copied our database over to test and am running various alternatives and I have also raised the call with Epicor. I wasn't sure if it was a bug or something anybody else had ran into before... We do have other parts where the Days of Supply is 5 that are working fine but those parts don't have an Unfirm Sales Order within 5 days of a Firm Sales Order which made me raise the question.
I've not had MRP create jobs for any unfirmed SO. It will create jobs greater than demand if I have a minimum run quantity or safety stock set on the part.