We are getting extra unfirmed jobs for a specific part. It’s a subassembly setup to backflush which we have a firmed job (make to stock) for enough quantity, (6 pieces). But each time MRP run it creates additional unfirmed jobs for each job that they go on, which is setup over a long blanket. Why doesn’t it just use the firmed job quantity we already have scheduled? Time phase below
look at the sales orders and see if the release is marked as Make direct. There is also a field in Time phase i believe that says direct or not. also see if you have a min on hand for that part.
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Sales order is marked make direct, but i thought that was just for that parent part? This one is a child material item used on the parent item that is sold.
min is 0.
if i turn on the Suggestions for Time Phase it is showing it to cancel -5 of the parts. Is there a way to lock a job like you can a PO Release? There is a lock button just never used it. might try that.
Are the child parts marked as non stock on the site tab or have a lot size in the planning tab ?
child parts are stocked & quantity bearing and have no lot size.
I’m assuming you did, but check the sites tab too. It’s possible that the sites and the general tab don’t match up.
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Yes, double checked both. That was a learning in the past so i made sure to check it as well!
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can you show a screen shot of the planning tab
Do you have a suggestion to reduce the firm job out there? You’re days of supply of 0 mean that it’s going to want to have the materials available on the specific day it’s required.
edit: yeah, that’s what you said. Yeah that’s what’s happening. The suggestions say that you don’t need the parts, so reduce the job that’s out there, and use the other ones instead. You’ll have to play with days of supply, time fences and some other settings to not see nuisance suggestions/unfirm jobs like that.
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I think that’s it. You want to check both Locked (qty) and Locked (schedule).
If it still gives suggestions after running MRP again, then you might need to increase the Reschedule Out Delta on Part Entry for the subassembly (Sites > Planning).
Also, how is the sub marked on the parent? Pull As or Plan As?
My guess is that it is Plan As. You will either want to switch it to Pull As or select the Auto Consume Stock check box on the site for the sub.
Marked as Pull as Assembly. I’m thinking the locking is the key. The challenge is this subassembly needs 3rd party (edit: Subcontract) work done, so we can’t wait to use the other jobs. That’s why I firmed a job to cover all 6 early, so we can get them done and in stock.
Sorry, the Pull As/Plan As always gets me. You DO want to check the Auto Consume Stock for a sub that is Pull As. From MRP Guide.
Well that’s interesting. Ran a quick BAQ and we have about 24,000 pull as assembly items and none have Auto Consume Stock checked. In fact we have no parts with Auto Consume Stock checked…
Edit i was mistaken this is Not marked as Pull as Assembly. just View.
You are going to want to mark each subassembly as something, either Pull As or Plan As. I don’t even know what happens when a sub is not marked as either. I’m going to have to try and find that out. 
i talked with our CAD guys who enter methods/parts and they have never used Plan As, only Pull As and View As.
Thanks to @Chad_Smith for the answer.
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?
Locking qty and schedule seemed to do the trick. after our full overnight MRP only the original job remains. Thanks for the help everyone.
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