A warehouse management system ER diagram illustrates the different relationships among warehouse, inventory, product, supplier, purchase order, customer, and shipment entities. Warehouses store inventories that correspond to products. Products are supplied by various suppliers and shipments are sent out when there are customer orders. The diagram also describes the interaction of purchase orders with products and suppliers. It is therefore possible to understand the processes of management of warehouses and products, suppliers, and shipments of cargo, which helps to organize work concerning inventory control, order processing, and delivery to customers in the warehouse system.
