I put together this scene, which is part of the Full Cloud HCM story, to convey the available integrations from SuccessFactors Employee Central to SAP ERP.
The next scene is about the integration of SuccessFactors Employee Central with on-premise SAP Payroll. This is a very valid scenario because there are over 7000 SAP Payroll customers.
I have over simplified the integration diagram on purpose. If you believe key information is missing and must be conveyed in this basic diagram, please let me know and I will add it. If this diagram is clear, please let me know that as well.