Hi Kamal,
We have two different processes how the activity of the same cost centre will be allocated to the receiver objects:
with activity type B: all acitivities related to major projects (internal orders) with a pre-defined, fixed tarif (valid for all cost centres charging activities on these projects)
with activity type A: all remaining activities related to maintenance on equipement with work orders (SAP-PM) with a calculated tarif based on total costs (incl.settlement of act.type B) and activities planned on work orders
hope this helps.
kind regards,
Roberto