Instructions

What kinds of users should be anticipated for an air$-$traffic control system?

$[10$ Marks$]$

Design a GUI for an audio format converter based on usability principles. Explain your

design.

The following is the use case related to the car park system.

Use case: Exit the car park by paying using a debit card.

Goals: To leave the parking lot after having paid the amount due using a debit card

Preconditions: In addition to 'exit car park' preconditions: The driver must have available

his or her debit card and know the PIN. The driver must have sufficient funds in his or her

bank account.

Related use cases:

Specialization of: Exit car park

a$)$ Identify the actor's actions

b$)$ Identify the system response for each actor's action