MRP#1 - Why MRP in Business Central “Doesn’t Work” (And Why It’s Usually Not a System Issue)

One of the most common complaints we hear is:

In almost every case, the system is working — it’s just following rules that haven’t been fully defined.

MRP in Dynamics 365 Business Central is not an intelligent planner. It is a deterministic calculation engine. It does exactly what your item data, planning parameters, and setup tell it to do.

Common Symptoms

• Constant emergency action messages

• Planned orders that make no practical sense

• Excess stock alongside shortages

The Root Cause

MRP has been treated as a button, not a process.

Running the Planning Worksheet without validated item planning data guarantees poor results — even though the system is behaving correctly.

How to Avoid This

• Validate planning setup before trusting MRP output

• Start with a small item set and expand gradually

• Treat MRP as an operational discipline, not a feature toggle