Modelling Business Information: Entity Relation... -

An Entity-Relationship Model, or ER Model, is a conceptual representation of data that typically evolves through three stages: conceptual, logical, and physical.

Introduces specific attributes, primary keys, and foreign keys, mapping out operational data rules without being database-specific.

Modelling Business Information using Entity-Relationship (ER) diagrams is a foundational technique for defining the structure, relationships, and rules of data within an organization . It acts as a bridge between business requirements and technical database design, enabling stakeholders to visualize the "things" (entities) a business cares about and how they interact. Core Components of ER Modelling Modelling Business Information: Entity relation...

The associations between entities, such as a Customer "places" an Order .

Specific properties describing an entity, such as Customer Name or Product Price . An Entity-Relationship Model, or ER Model, is a

Provides enough detail for database developers to build the actual system, including technical data types. Benefits of Entity-Relationship Modeling What is an Entity Relationship Diagram (ERD)? - Lucidchart

Defines the numerical context of relationships, such as One-to-One (1:1), One-to-Many (1:N), or Many-to-Many (M:N). The Three Levels of Data Modelling It acts as a bridge between business requirements

Defines the high-level business scope and key concepts, focusing on business vocabulary rather than technical detail.