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UML Distilled

Learn about State Diagrams, Activity Diagrams, and Deployment Diagrams to effectively visualize system states, activities, and physical layouts. Understand when to use each diagram type and when not to. Enhance your system design and analysis skills with these powerful visualization tools.

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UML Distilled

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  1. UML Distilled Martin Fowler

  2. State Diagrams • State Transition Diagrams define a number of states and the transitions between the states

  3. Harel Statechart

  4. When to use State Diagrams • Describing an object across several user-cases

  5. Activity Diagrams • The activity diagram describes the sequencing of activities, with support for both conditional and parallel behavior. An activity diagram is a variant of the state diagram where the states are activity states.

  6. Activity Diagrams

  7. When to use Activity Diagrams • Analyze a user-case • Understanding workflow • Describe a complicated sequential algorithm • Dealing with multi-threaded applications Do not use it when: • Trying to see how objects collaborate • Trying to see how many objects behave over their lifetimes

  8. Deployment Diagrams • A Deployment Diagrams shows the physical layout of components on hardware nodes. A deployment diagram is a good place to show how components and objects are routed and move around a distributed system.

  9. When to use Deployment Diagrams • Distributed Systems

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