Accounting Information System Assignment

its an accounting information system lecture Case (1) Carrefour is a French multinational retailer headquartered in France. It is one of the largest hypermarket chains in the world. Carrefour, like any other big corporations, concerns about enhancing its decision making to handle the increase in retailing operations by improving the information systems inside the corporation. Carrefour provides a step-by-step narrative description of the purchasing and payment system:

1- A purchase order is sent from the inventory system to the purchasing department clerk. The purchasing clerk repairs a purchase order using the vendor and inventory files and mails it to the vendor. 2- The vendor returns a vendor acknowledgment to the purchasing clerk indicating receipt of the purchase order. The purchasing clerk then sends a purchase order notification to the accounts payable clerk. 3- When the receiving department accepts vendor goods, the inventory system sends the accounts payable clerk a receiving report. 4- The accounts payable clerk also receives invoices from the various vendors. He matches the invoices with the purchase order notification and the receiving reports and updates the accounts payable master file. 5- The accounts payable clerk then sends payment authorization to the accounting department. 6- The accounting department prepares and mails a check to the vendor. When the check is issued, the system automatically updates the accounts payable master file and the general ledger. Required 1. Develop a context diagram DFD of the purchasing and payment system at Carrefour. 2. Prepare a flowchart to document the purchasing and payment system at Carrefour.