Use case diagram

A use case diagram[1] is a graphical depiction of a user's possible interactions with a system.

While a use case itself might drill into a lot of detail about every possibility, a use-case diagram can help provide a higher-level view of the system.

[2][3] Due to their simplistic nature, use case diagrams can be a good communication tool for stakeholders.

The drawings attempt to mimic the real world and provide a view for the stakeholder to understand how the system is going to be designed.

Siau and Lee conducted research to determine if there was a valid situation for use case diagrams at all or if they were unnecessary.