Hi,
They are used to assign different catalog type (except 3 for UD) to a MIC. Let say you need to enter different values at different stages/purpose.
- If you need regular results while RR then you'll go for type 1.
- If you need to record defects, then you would need catalog type 9.
- If need some activity, then you would need 8.
Use F1 help and you will understand this.
ntn