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Use Case Diagram Template

Show how personas might interact with use cases.

About the Use Case Diagram Template

What is a use case diagram?

Use case diagrams are a powerful tool that help you visualize the relationships between personas and use cases. This tool is very helpful in quickly understanding system functionality.

A use case diagram is helpful because it allows you to design a system from the perspective of the end user. A use case diagram typically depicts the expected behavior of the system: what will happen and when. It’s a powerful tool for communicating your desired system behavior in the language of the user, by specifying all externally visible system behavior.

Use case diagrams generally lack a lot of detail. The main purpose of them is to help with the following: representing the goals of system-user interactions, defining and organizing the functional requirements in a system, specifying the context and requirements of a system, and modeling the basic flow of events in a use case.

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When to use a use case diagram

Different scenarios where your system or application interacts with people, systems, or organizations can be modeled using your use case diagram. In addition, the diagram can be used to represent and discuss goals that users (or "actors") achieve with the help of your system or application.

Advantages of use case diagrams

Use case diagrams are effective tools that can help your team communicate and analyze the scope of your system. Draw a use case diagram anytime you need to specify context and requirements for a system to operate, or model the flow of events in a given use case.

How do you create a use case diagram?

Using FigJam's virtual collaboration tool, you and your team can easily create and share your own use case diagram. Select this Use Case Diagram Template, and start following these steps:

Step 1: Identify your actors

People who interact with your system are called actors. This can include customers, users, other systems, and organizations.

Step 2: Identify use cases

The best way to start is by asking what the actors need from the system. For example, at a library, actors may need to pick up books, return books, get a library card, reserve rooms, or use the internet. All of these activities would be classified as use cases.

Step 3: Identify common functionalities

If you have multiple use cases that share common functionality, you can extract that functionality into a separate use case.

Step 4: Identify generalizations

Can you think of any actors who might be associated with similar use cases that would trigger unique cases for them? If so, you can generalize that particular actor. A commonly cited example is the “make a payment” use case in a payment system, which can be generalized to “pay by debit card,” “pay by cash,” “pay by credit card,” and so on.

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