A Use Case Diagram is a visual representation of the interactions between actors (users or external systems) and a system to achieve specific goals. It provides a high-level view of the system’s functionality and helps in understanding the functional requirements from a user’s perspective¹.

Steps to Draw a Use Case Diagram

Step 1: Identify Actors

Determine who or what interacts with the system. These are your actors, which can be users, other systems, or external entities¹.

Step 2: Identify Use Cases

Identify the main functionalities or actions the system must perform. These are your use cases, each representing a specific piece of functionality¹.

Step 3: Connect Actors and Use Cases

Draw lines (associations) between actors and the use cases they are involved in. This represents the interactions between actors and the system¹.

Step 4: Add System Boundary

Draw a box around the actors and use cases to represent the system boundary. This defines the scope of your system¹.