![]() If not, consider adding additional entities and columns. Review the ERD carefully and check if the entities and columns are enough to store the data of the system.Define the properties of entities by adding columns.Draw the major entities involved in the scope.Knowing the modeling scope prevents you from including redundant entities and relationships in your design. Make sure you are clear about the scope to model.Are you trying to present an overall system architecture that involves the definition of business objects? Or are you developing an ER model ready for database creation? You must be clear about the purpose to develop an ER diagram at the right level of detail (Read the section Conceptual, Logical and Physical Data Models for more details) ![]()
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