Want to select purchasing Group according to plant

Question

Hi experts,
I want to make customization in SRM portal. We have a specific requirement that while creating shopping cart the purchasing group should get changed if Location is changed.
For example if lets say A & B are purchasing grps and lets say X & Y are locations. I want if we change the location from X to Y the purchasing grp should get changed to B from A.
We already have maintained attributes in org structure.
Can please anyone help us out for making said changes.

Answer 1

Hi there,
SC items are assigned to purchasing groups according to the following     
characteristics:                                                                               
(1) Organizational assignment of the requester: The purchasing group     
     must be responsible for one department of the requester's parent     
     reporting line.                                                                               
(2) Product category of the item: The purchasing group must be           
     responsible for the chosen product category.                                                                               
(3) Product category's target system: The purchasing group must be       
     assigned to the item's target backend system (tab card 'Function').                                                                               
If not all conditions can be fulfilled at once, the algorithm of          
function module BBP_OM_FIND_SC first ignores condition (1), then          
(1) & (2), and finally (1) & (2) & (3) to ensure that an item will        
always be assigned to a purchasing group.                                                                               
This of course can be overwritten by your BADI BBP_PGRP_FIND.
Hope this helps,
Kind regards,
Matthew