The Business Navigator contains the process models from the R/3 Reference Model. The process models have been revised and enhanced for Release 4.0A.
The way you open the Business Navigator has been changed. If you choose Tools -> Business Engineer -> Business Navigator, the Process flow view is opened. You can then open the Component view by choosing Goto -> Component view.
You can open documentation for the enterprise process areas and business scenarios direct from the Hierarchy Business Navigator structure.
Input-output assignments and OrgUnits for the processes are no longer available from the Business Navigator.