Why credit control area is used for and why it is required in S/4 HANA when we are maintaining credit limit in credit segment? Secondly, can we do relationship between two BP's (Parent and Child) using two different credit segment? Thirdly, can we maintain same credit limit for both parent and child. Lastly, when we use main credit segment is it only when your BP is doing business in all the credit segments? Lastly, can someone explain about credit hierarchy in credit management what is the flow down.