So what do you when your client asks you to activate the customer hierarchy in reporting? Simple your say, you deep dive into ECC, look for the 0CUSTOMER hierarchy DataSource and activate. You do a quick RSA3 check and receive....no data.
Your day just became a little more interesting. After some investigation you find out your client did not implement “Classification” and therefore has no hierarchy on 0CUSTOMER. They do however have a hierarchy on the logistical view of the customer. As 0CUSTOMER is part of your data model you decide not to introduce 0CUST_SALES, but instead load it to your 0CUSTOMER object.
Read more at : http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/27798