Online food delivery system DFD with six core processes: user registration, restaurant browsing, order placement, payment processing, order management, and delivery tracking across five data stores. Data flows from customers, restaurants, and delivery personnel through processes that interact with user, restaurant, menu, order, and payment databases. This multi-level DFD demonstrates how to decompose a complex transactional system into manageable processes and data dependencies. Fork this diagram on Diagrams.so to customize processes, add AWS service mappings, or extend with additional data flows for your platform requirements.