The debtor should be able to create a central purchase („Zentraleinkauf") with the help of the role administration in the B2B Suite and limit this central purchase to a certain catalog assortment (e.g., only 50,000 of 60,000 products). The central purchasing department, in turn, should also be able to restrict buyers to a certain assortment of only 250 products in the front end within the B2B Suite.