Use Case Diagram for the Elevator System

Let’s build the use case diagram of the elevator system and understand the relationship between its different components.

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

System

Our system is an "elevator."

Actors

Next, we will define our elevator system’s main actors.

Primary actors

• Passenger: This actor is the passenger in an elevator. It can request an elevator, open and close the door of an elevator, move up and down using the elevator, and press the emergency button.

Secondary actors

• System: It can open and ...