Burger Quick's inventory control system uses a UML use case diagram to map four distinct user roles—Administrator, Purchasing Manager, Kitchen Chief, and Supplier—against 13 core system functions. The diagram shows how each actor interacts with use cases like product management, purchase registration, stock tracking, and inventory alerts, with include and extend relationships clarifying dependencies between operations. This architecture demonstrates role-based access control and separation of concerns, ensuring that purchasing, kitchen, and administrative teams work within their assigned responsibilities. Fork this diagram on Diagrams.so to customize actor roles, add new use cases, or adapt it for your restaurant or retail inventory workflow.