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
Explain how the above components may interact.
Draw a context diagram (Level 0 DFD) to represent the above system (i.e. no data stores).
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
Draw a Level 1 Data Flow Diagram to represent the above system.
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