<ul data-eligibleForWebStory="true"><li>Use case diagrams are an effective way to visualize system interactions and relationships between actors and use cases.</li><li>In a use case diagram, actors participate in specific actions, while relationships between use cases can be shown using 'include,' 'extend,' and inheritance.</li><li>For example, in the context of a restaurant system, a customer placing an order would trigger the restaurant to always receive the order, demonstrating the include relationship.</li><li>The extend relationship, on the other hand, suggests that delivering an order may be an optional part of the tracking process.</li><li>Tools like PlantUML can be used to create visual representations of these interactions for better understanding.</li></ul>

️ Architecture: How to Visualize System Interaction — Use Case Diagram

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