This is done with partner determination procedure, have a look at
http://scn.sap.com/community/crm/sales/blog/2015/03/22/partner-processing-in-sap-crm
This is done with partner determination procedure, have a look at
http://scn.sap.com/community/crm/sales/blog/2015/03/22/partner-processing-in-sap-crm