This Inventory System ERD Model describes the structure of the proposed system by indicating the classes, attributes, operations or methods, and relationships between the classes. Figure 7 shows a class diagram that depicts the common components of classes, class attributes, and class operations. The Entity Relationship (ER) model diagram for the barcode inventory system is shown in Figure 8. The ER model represents the user's reality. It comprises entities, attributes, and relationships that are reasonable assumptions for the proposed system. The ER model represents the user's reality. It includes entities, features, and relationships that are reasonable assumptions for the proposed system.
