Use Case Example

Name: Purchase ticket

Participating actor: Passenger

Entry condition:

• Passenger standing in front of ticket distributor.

• Passenger has sufficient money to purchase ticket.

Exit condition:

• Passenger has ticket.

Event flow:

1. Passenger selects the number of zones to be traveled.

2. Distributor displays the amount due.

3. Passenger inserts money, of at least the amount due.

4. Distributor returns change.

5. Distributor issues ticket.

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