Activities

Use Lucid Chart for these activities - it has all the blocks you need.

Food Ordering System

Context Diagram / Level 0 DFD

Below is an online food ordering system:

• External Entities: Customer, Restaurant

• Processes: Place Order, Notify Restaurant

• Data Flows: Order details, Confirmation message

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1. Explain how the above components may interact.

2. Draw a context diagram (Level 0 DFD) to represent the above system (i.e. no data stores).

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Level 1 DFD

Here is an updated version of the food ordering system with more functionality:

• External Entities: Customer, Restaurant

• Processes: Receive Order, Process Payment, Notify Restaurant

• Data Stores: Order Records, Payment Transactions

• Data Flows: Order Details, Order Receipt, Payment Info, Store Payment Data, Order Confirmation, Order Notification, Save Order

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1. Draw a Level 1 Data Flow Diagram to represent the above system.