Activity Diagram for the Library Management System

Activity diagrams are a great way to visualize the flow of messages from one activity to another in the system. There can be different activity diagrams that we can create for our LMSLibrary Management System. In this lesson, we will create activity diagrams for the following three activities:

• Check out a book from the library.

• Return a book to the library.

• Activity challenge: Renew a book from the library.

Check out a book from the library

The following are the states and actions involved in this activity diagram.

States

Initial state: The member selects a book and initiates checkout.

Final state: There are two final states present in this activity diagram, shown below:

• The member completes the checkout process successfully, and the book will be allocated to the member.

• An error occurred during the checkout process due to book unavailability, or the book limit was exceeded.

Actions

The member selects a book and enters the ID. The system performs a few checks, such as book availability, the member’s maximum limit, and book reservations. If all checks are clear, the book will be issued. Otherwise, the system will show an error message.

The activity diagram of a library book checkout is given below based on the order shown above.