Example case:

We have a part with a minimum lot size of 50 pcs.

We create a non project related demand for the part of 2 pcs and run the MRP.
A supply of 50 pcs will be planned. OK so far.

Now we create a project related demand for the same part of 2 pcs and run the PMRP.
Another supply of 50 pcs will be planned, even though in planning 48 pcs would be left from mrp planned supply.

MRP/PMRP do consider quantity on stock, but not planned quantities of the other.

Effect:

We buy/manufacture 100 pcs instead of 50 pcs for a demand of 4 pcs
Unnecessary procurment/manufacturing, incoming inspection, warehouse, scrapping costs.

We already had that topic checked by IFS R&D. Works as designed.
Any other customers having the same issues?