Required:

Draw a context data flow diagram

Draw a Physical Data flow diagram

Draw a Logical data flow diagram

6.6 The following is a description of ordering food through Find Your Food The customer uses their computer to go to the Find Your Food website and enters their postcode Based on the postcode entered, the Find Your Food web server searches the restaurant master file and returns a list of restaurants within a ten-kilometre radius, along with the store opening hour The customer then selects a restaurant by clicking on its hyperlinked name, with the Find Your Food web server then retrieving a list of the menu items available from the menu data file. If the customer wishes, they are able to click on a particular food item for a picture of the meal as well as details of ingredients. This was introduced as a result of concern for people with allergies to particular ingredients, although web usage data indicates only 10 per cent of customers use this feature, The customer then enters the quantities for the food items that they wish to order and the website calculates the order total. If the order details on the screen meets the customer's requirements the customer clicks on the "My order is correct' button and is required to login using their account name and password (new customers can create an account). Account login details are verified against the customer master data. Account details are used for delivery address details and customer contact regarding orders, as well as for marketing by Find Your Food. The customer details are held by the Find Your Food web server, which is located in their Neutral Bay office. Once the customer is logged in, the full details of the order, the amount and delivery details are shown on the screen. The customer reviews these details and if they are correct they enter their Systems characteristics and Considerations