Use Case Diagram for Facebook

Let's begin building the use case diagram of Facebook and understand the relationship between its different components.

First, we are going to define the different elements of our Facebook system, followed by the complete use case diagram of the system.

System

Our system is "Facebook."

Actors

Now, we’ll define the main actors of Facebook.

Primary actors

• User: This actor can create a profile of themselves containing their personal information. They can create posts, pages, and groups, and add various sorts of multimedia like images or videos. They can also interact with other users by sending them friend requests and messages, commenting on their posts, etc.

Secondary actors

• Page/Group Admin: The admin is in charge of performing numerous operations, including blocking or unblocking users from groups or pages, deleting an existing group, changing the group’s privacy, etc.

• System: This is responsible for sending out notifications for new friend requests, messages, comments, etc.

Use cases

In this section, we’ll define the use cases ...