This ER Diagram for Department Relationships explains how entities interact with one another. In simple terms, it is a representation or framework of your company or a specific business process. Entities are the objects for which data must be stored. A department in your company needs to store data, or it could be sales, revenues, or clients. An entity relationship diagram depicts how these entities are related to one another. It could be referred to as the blueprint that underpins your business architecture, providing a visual representation of the relationships between various data sets (entities). Entities are represented in the diagram by boxes with lines connecting them to different attributes that describe the entity's qualities or characteristics.