MRP creating un-required unfirmed job

[jkane (John Kane)]

Thanks to @Chad_Smith for the answer.

Plan as Assembly’ and ‘Pull as Assembly’

Point of clarification: having NEITHER box checked makes it act like a normal material. Valid states are: neither checked, Pull As Assembly, Plan as Assembly. As far as Pull vs Plan as Assembly, when you check one, it will uncheck the other. You can’t have both. It’s one or the other or neither. There is also View as Assembly. It doesn’t change much on how things behave, but it does let you drill down into the different manufactured items involved.

So, the results you are seeing makes sense now.

Plan As Assembly will check inventory to see if a quantity will be available when it is required on the parent job. If it is not available, it will create a separate job to fulfill the demand. If that part is also marked as Non-Stock, it will create a Job to Job demand link.

Pull As Assembly does not check inventory for available quantity. It assumes you want to manufacture the sub on the same Job that is created for the parent. If Auto Consume Stock is checked off, the engine will check for stock available to fulfill the demand, and if it does not, it will do the previous.

If neither is selected, the engine assumes you are going to determine the way of fulfilling demand yourself.

I’m assuming the demand link in your time phase is WH?