Food delivery ER diagram models a multi-role platform with User, Customer, and Shipper entities inheriting shared authentication data. Orders flow from customers through OrderDetail line items to FoodItems, with Payment and Shipper assignment tracked separately. This schema demonstrates proper normalization: role-based user inheritance, order-detail decomposition for cart line items, and category-based food catalog organization. Fork this diagram on Diagrams.so to customize roles, add restaurant entities, or extend payment methods for your delivery platform. The design supports concurrent customer orders and shipper availability tracking, critical for real-time dispatch workflows.