Hello,

I work with IFS 10 and have run into sort of a systematic issue. We use PMRP (Project MRP). The issue is with spare parts calculation and engineering changes. Here is an example:

Let’s say we have a parent say Part A and it needs 10 of Part D. Our system will apply a 30% spares to this requirement. So total demand is for 13.

Then one day engineering has developed their designs further and determined parent Part A needs sub-assembly Part B and sub-assembly Part C. Both sub assemblies Part B and C will require Part D of 5 each.

So the system will apply 30% to each individual demand of 5. 30% of 5 is 1.5 and the system will round up to 2. So total parts will be 14 instead of 13. Our intention is to order 13 of Part D. 

This is a simple example but obviously applying this to hundreds and thousands parts we buy you can see that it causes a lot of excess buying.

Is there a way to apply sparing to say cumulative demand by part? Preferably by activity sequence?

Thank you in advance.