SAP ECC with HANA architecture integrates core ERP modules (FI, CO, MM, SD, SCM) with HANA's in-memory database layer, supported by SAP PI/PO middleware and API Gateway for seamless external system connectivity. Data flows from Salesforce CPQ, SolidWorks PDM, Concur, SAP Ariba, and financial satellites (BlackLine, HighRadius, HFM, TRAX) through the Integration Layer into ECC Core, with master data governance via MDM Hub and SABIX authorization. High availability is ensured through HANA Primary, Standby, and DR nodes with system replication and backup storage, while SAP Fiori provides the UI layer and BW/4HANA enables analytics across Finance, Controlling, Procurement, and Supply Chain domains. This architecture demonstrates enterprise-grade integration patterns, disaster recovery resilience, and centralized master data management critical for large organizations. Fork this diagram on Diagrams.so to customize module dependencies, add your satellite systems, or adapt replication strategies for your landscape. Consider your RTO/RPO requirements when configuring HANA standby and DR node placement across data centers.