Using the Visio application software that comes with your Microsoft OneDrive Office account submit a DFD of the data flow of the business processes inside the company between departments.

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Sales, Despatch, Accounts and Warehousing System A customer sends in an order for goods to the Sales Department. The customer's details are checked and then authorisation of credit is sought from the accounts department. If this is given then the order is sent to the warehouse for processing. The goods on the order are picked from the shelves and the stock levels on the stock file are adjusted. Once the goods have been picked and checked they are sent to the Despatch Department where they are parcelled up and sent to the customer with a delivery note. A copy of the delivery note is sent to the Accounts Department. When the Accounts Department receive a copy of the delivery note they use the information on it to produce an invoice for the customer, which they send by post When the Warehouse need to order more stock they send a purchase order to their suppliers. Copies of the purchase orders are sent to the accounts department. Stock is received from the suppliers into the Warehouse on a regular basis, and is accompanied by a goods received notes. A copy of all goods received notes are sent to accounts who use them to check any invoices sent from suppliers for payment of stock