The key concepts and relationships needed for inventory resource management are depicted in this ER Diagram for Inventory Management System. It is not intended to be a complete data model with every required relational database table nor a prescriptive design for resource management system implementations. Entity keys are used to identify instances of entities uniquely. Candidate keys are attributes that have distinct values, and one of them is chosen as the primary key. The attribute domains should be defined ahead of time. The Fundamental entity, Subordinate entity, Associative entity, Generalisation entity, and Aggregation entity are the entities in an ER diagram for an inventory management system.
