They are the external entities that interact with your system and can be a person, another system or an organization.

Identify the actors and add them to the workspace, outside the system boundary.

Start by drawing the system boundary and giving a name to the system.

You can start drawing the use case diagram with Creately’s use case diagram tool which comes with a simple drag and drop interface and intelligent use case diagram shapes that make drawing easier.

And you get access to it from anywhere in the world. You can easily share your diagram and verify the results. If you edit it multiple times the final version will remain clean. Check out the use case diagram tutorial for a detailed guide.Īn online use case diagramming tool enhances the benefits you get from drawing a use case. They define the requirements of the system being modeled and hence are used to write test scripts for the modeled system. They are also great storyboard tools for user meetings. Use Case diagrams are used to identify the primary elements and processes that form the system.

The actors (those who interact with the system)Īdvantages of Using a Use Case Diagram Software.

Use case diagrams can also be used to document the functionality of an existing system and define which users are permitted to use which functionalities retrospectively. Use case diagrams are applied during the analysis and design process as a way to describe the requirements of the customer and what the future system is for. While it depicts what a system should do and which user of the system uses which functionality, it doesn’t address any realization details such as data structures, algorithms, etc. In simpler words it depicts how a possible user would interact with the system. More Templates What Is a Use Case Diagram?Ī use case diagram is a type of UML diagram that is used to describe the possible usage scenario that a system is developed for.

Use case diagram online