Level 0 DFD (Context Diagram): Process: Purchasing System External Entities: Supplier: Engages with the system by receiving purchase orders and sending goods and invoices. Warehouse Manager: Interacts with the system for goods receipt and inventory updates. Purchasing Officer (PO): Initiates purchase orders based on inventory needs and handles invoice processing and payments. Data Flows: Purchase Orders (from PO to Supplier) Goods Delivered (from Supplier to Warehouse Manager) Invoices (from Supplier to PO) Inventory Updates (from Warehouse Manager to System) Data Stores: Inventory Database: Contains current inventory levels and item details. Invoice Records: Stores information on received invoices. Payment Records: Keeps track of payments made to suppliers. | Anything