There is a Collaborative Business Map (C-Business Map) for Vendor-Managed Inventory (VMI), where the supplier uses both an SAP APO and an SAP R/3 System, and the customer uses an SAP R/3 System, in the C-Business Scenario documentation in SAPNet via Alias C-BS Media Center Documentation; Collaborative Business Scenarios ® Channel Master-driven Scenarios ® Vendor-Managed Inventory: Overview