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MDVP Collective check

Dear Experts

I am trying to execute the MDVP collectively.

I entered one part number ( A) and it has the component B and 2 planned orders

Stock of component B is 200 pcs

Requirement from each planned order is 400 pcs.

so in total 800 pcs are needed.

But on doing Availability check, the system gives that 50% of each planned order can be produced.

Ideally only one planned order of 50% can be produced and not 2. But the system is showing otherwise and marks the component B as Missing component.

i am using firm planned order too...

I am using customized checking rule which checks only physical stock. and Partial confirmation.

Am I missing something. Kindly guide.

thanks and regards

Nagendra Kumar

Former Member
Former Member replied


The issue is the system is not doing a collective check instead it is doing one by one even though firming of planned order is set

Well, when the system does a collective check, it always does each check one-by-one.  This is normal.  'Firming' is irrelevant to ATP.  Firming is only used for planning, not for ATP.

During ATP, each requirement being checked 'competes' for any existing availability.  Availability is computed by including all the supplies and all the demands that you have placed in your scope of check.

Your problem seems to be that the system is not respecting the results of the checks for any other planned orders that have already been confirmed.  In order for ATP algorithm to 'know' that other planned orders have already been checked, and that they should reduce the ATP quantities for the CURRENT order being checked, you have to check "Incl. dependent reqs".  If you think you will also be converting these to production orders, you may also want to place either an 'X' or 'A' in "Incl.depend.reserv" as well.

CO09 shows only the supply and demand elements that are being checked in the ZB rule.  Since you are checking no other requirements, no requirements are displayed.  What is a bit puzzling is that you said there was 200 in stock of B; but your CO09 says zero.  Can you display an MMBE of B?

Best Regards,


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