Can anybody tell me about the standard logic followed for determining the Planning and Execution organisation for different stages?

As far as I think;

For the pick up stage; the P & E Organisation is same as Forwarding house

For the Main Carriage; it is derived from Config via a Consolidation function

For the Delivery ; it is same as the Forwarding house relevant to the Business Unit(Destination).

Please clarify if this is right or some other Standard Logic is being Followed?