Use Case Diagram for the Car Rental System

Let’s build the use case diagram for the car rental system and understand the relationship between its different components.

First, we’ll define the different elements of our system, followed by the complete use case diagram of the system.

System

Our system is “rent a car.”

Actors

Now, we’ll define the main actors of our car rental system.

Primary actors

• Member: This is the primary actor of the system who can reserve a vehicle, make payment, and change or cancel the reservations of the vehicle.

Secondary actors

• Receptionist: This actor acts as the system’s admin and can perform any task a “Member” can perform. This can also add, remove, or modify the vehicle or its reservations and update logs.

• Worker: This actor can update logs, return vehicles, and pay bills.

• System: This can send notifications related to reservation to members.

Use cases

This ...