Comprehensive ERP/HCM System Diagramming

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My ERP & HCM implementation has reached the design phase and I now need a full set of analytical diagrams to lock down requirements before development begins. The data-flow diagram must capture every major process, datastore, external entity and the data that moves between them, giving a clear, end-to-end picture of how information circulates through the entire platform. For the Use Case diagram I want all core functionalities mapped against the corresponding user or role so responsibilities and permissions are crystal-clear at a glance. Beyond those two, I also want: • an ERD that lays out entities, attributes and relationships in a way that supports both the ERP modules and the HCM components, and • sequence diagrams showing the most critical interaction flows,...

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