OOB is out-of-box, it means the standard feature.
The OOB feature consider both constraints. There is no parameter to configure it.
You need to do a customization that the MRP does not consider the default order setting.
The min quantity is 15, and the default order quantity to use for requirement calculation is 24. So the order requirement quantity is 24.
If you want to the planned quantity is 15, you need to clear the inventory multiple.
Please don't duplicate or cross post your questions. You have created the same in the AX forum: community.dynamics.com/.../minimum-and-inventory-multiple-in-master-planning
As the tag AX2012 is used, I do assume your question is related…
First of all note that this forum is monitored by volunteers. The word 'urgent' will not help you getting some priority.
Can you share in detail how you did currently setup master planning, the calendar and tell the required outcome…
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