1. Takeaway Restaurant data flow in a takeaway restaurant:  The order is taken on a carbon pad.  the cost is calculated from the menu.  the order is checked with the customer.  if OK the order is stuck on a pin-board.

2. Takeaway Restaurant  When the food is ready, the order becomes the  delivery note for the driver.  At the close of business, carbons are used to update accounts and then dumped along with the delivery notes.  Management information is passed to the manager.

3. Delete All Orders Re-check Order Deliver Order Calculate All Orders Record Order Calculate Order Delete Delivery Sheet 1 2 3 4 5 6 7 Carbon pad Menu Pin 1 Delivery Sheet Waste Bin Customer Meal and Customer details Price of meal New price Details Signature Meal and Customer details Look up meal Record prices Prices Look up prices Name, ticket no.and price Dump carbon Meal total Retrieve delivery sheet Dump delivery sheet Carbon details Retrieve carbon D1 D2 D3 D4 Account BookD5 D7 Fast Food Delivery System Current System Level 1 DFD *second copy goes on Pin2 as a backup Pin2D6 Manager Daily sales

4. Customer Menu Notes: Customer gives meal details (1) and prices are looked up (2) in the menu before being added (3) to the carbon pad. Customer details such as address etc. are then added (4) to the carbon pad. Fast Food Delivery System Current System Level 2 DFD 1 4 3 2 4 Current System – Level 2Process 1 – Record Order Details Carbon PadD1 D2 Record Meal Details 1.1 Record Customer Details 1.2

5. Current System – Level 3Process 1.1 – Record Meal Details Customer Add New Meal to Order 1.1.1 Amend Order Meal Details 1.1.2 Delete Order 1.1.3 Fast Food Delivery System Current System Level 3 DFD Carbon PadD1 MenuD2 Waste BinD6 Notes: During a call the customer can simply add meals to her or his order which go straight onto the carbon pad. However, they could also change their mind (1) in which case new prices need to be looked up and the original carbon entry changed. They may even want to cancel the order (2). Level 2 UNCHANGED data flows are shown in blue 1 1 1 1 2 2

6. Current System – Level 3Process 1.2 – Record Customer Details Customer Add New Customer Details 1.2.1 Amend Customer Details 1.2.2 Fast Food Delivery System Current System Level 3 DFD Carbon PadD1 Notes: During a call the customer’s details – name, address etc. are added to the carbon pad. However, during the call it may be necessary to amend their details (for example, if the telephone operator has misheard the original details. Level 2 UNCHANGED data flows are shown in blue Changes to Customer Details Customer Details

7. Current System – Level 2Process 2 – Calculate Order Value Customer Record Meal Prices 2.1 Calculate Order Value 2.2 Fast Food Delivery System Current System Level 2 DFD Carbon PadD1 Notes: During a call individual meal prices are looked up in the menu and added to the carbon pad. On completion of an order the prices of all ordered meals, on the pad, are added together to give the total cost of the meal. This is then relayed to the customer. Meal Details Total cost Of meal MenuD2 PricesAll Prices

8. Current System – Level 2Process 3 – Re-check Order Customer Amend Meal Details 3.1 Amend Customer Details 3.2 Recalculate Order 3.3 Fast Food Delivery System Current System Level 2 DFD Carbon PadD1 MenuD2 Notes: After an order is complete the customer may ring up to check they have given the correct details or to amend an order (forgotten the prawn crackers!) In this case details on the carbon pad are checked and amended as necessary before the customer is given the new price of the order. Meal Details Customer Details New Price of Order

9. Current System – Level 3Process 3.1 – Amend Meal Details Customer Add New Meal to Order 3.1.1 Amend Order Meal Details 3.1.2 Delete Order 3.1.3 Fast Food Delivery System Current System Level 3 DFD Carbon PadD1 MenuD2 Waste BinD7 Notes: After an order has been taken the customer may telephone to amend order details. She could ask to add new meals or amend meals and prices will have to be looked up in the menu. Or, she can cancel the order in which case it is consigned to the waste bin. Changes to Ordered Meals Customer and Order Details New Meal Details

10. Current System – Level 2Process 4 – Deliver Order Customer Complete Delivery Sheet 4.1 Obtain Customer Signature 4.2 Fast Food Delivery System Current System Level 2 DFD Pin1D3 Notes: When the order is ready for delivery the carbon on Pin1 is used to complete the drivers delivery sheet – customer details, cost of order. On delivery of the order the customer is asked to sign the delivery sheet. Delivery SheetD4 Customer Signature

11. Current System – Level 2Process 5 – Calculate All Orders Fast Food Delivery System Current System Level 1 DFD Calculate All Orders 5.1 Pin1D3 Account BookD5 Total Sales Total sales Order Values Manager Notes: At the close of business all orders that have been taken during the day (carbons) are taken from Pin 1 and the total value of daily business is calculated manually (using a calculator) by the Accounts person. This information is passed onto the restaurant manager.

12. Current System – Level 2Process 6 – Delete All Orders Delete Original Copies 6.1 Delete Duplicate Copies 6.2 Fast Food Delivery System Current System Level 2 DFD Pin 1D3 Pin 2D6 Waste BinD7 Notes: At the close of business all original and duplicate copies of orders (carbons) are removed from the pins and disposed of.