Advance Preference for Inventory Commitment by Item Group

HI All,

I am trying to reduce the number of entries for inventory commitment, so I would like to use Advance Preference instead of Standard. I want to do the set up based on Item Group so instead of having one record per item, I want to reduce it to four or five records using an Item BP Cat Code but it is not working. It is giving the correct BP if I use the customer but it is not working with Item Group.

I have the following setting:

1) A record in the Preference Schedule [P4070 ZJDE0002]

2) Preference Hierarchy = 06 and Item Group/All customers = 1