12. Data Flow Diagram Existing System System requirment Meaning Database Specification DFD
13. Data Flow Diagram Existing System System requirment Meaning Database Specification DFD
14. 0-Level DFD Existing System System requirment Meaning Database Specification DFD PURCHASE SALE SUPPLIER CUSTOMER Inventory management
15. 1-Level DFD Existing System System requirment Meaning Database Specification DFD SUPPLIER CUSTOMER Inventory management REPORT PURCHASE SALE Return Return
16. 2-Level DFD Existing System System requirment Meaning Database Specification DFD SUPPLIER CUSTOMER Purchase Files Sales Files MANAGEMENT REPORTS Stock in Hand SALES PURCHASES