Understanding the Differences Between MRP and MPS

What’s the difference between MRP and MPS? This is a question we often get, and it’s a good one, because there are several key differences that are important to know.

In short, an MRP, or Materials Requirements Planning, is used to determine how many materials to order for a particular item, while an MPS, or Master Production Schedule, is used to determine when the materials will be used to produce an item.

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Schedule MRP

If you have a relative large number of items to plan it could take a while to run the MRP calculations in Microsoft Dynamics NAV, an hour to do a full calculation is not uncommon, especially if you have been using the system for a while. In order to not have the MRP calculations to interrupt with the daily operations (such as posting orders) you typically want the calculations to take place during the night.

Bron : Olof Simren
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Regenerative versus Net Change MRP Planning in Microsoft Dynamics NAV

Dynamics NAV gives us the option to run Regenerative or Net Change MRP Planning (NAV Planning Worksheet).

The question is: Which one should you use?

From the APICS Dictionary:

Regenerative MRP: An MRP processing approach where the master production schedule is totally re-exploded down through all bills of material, to maintain valid priorities. New requirements and planned orders are completely recalculated or “regenerated” at that time. Ant: net change MRP.

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