Data flow diagram Level 1 modeling a multi-tier reporting management system serving outlet managers and head office leadership. The architecture ingests seven data sources—Order, Reservation, Catering, Inventory, Customer & Loyalty, and Promotion data—through five specialized report generation processes. Each process transforms raw data into targeted outputs: sales reports and outlet performance reports feed outlet managers, while inventory, promotion performance, and dashboard reports serve head office management. All generated reports consolidate into a centralized Report Data store, enabling consistent, role-based intelligence across the organization. Fork this editable DFD template on Diagrams.so to adapt data entities, processes, and flows to your specific business requirements and stakeholder needs.