DEV475 Mastering Object-Oriented Analysis and Design with UML ...

DEV475 Mastering Object-Oriented Analysis and Design with UMLExample: Activity DiagramExample: Activity DiagramConcurrentThreadsGuardConditionCheckScheduleSelect Course[ add course ]Decision[ delete course ]CheckPre-requisites[ checks completed ] [ checks failed ]Delete CourseActivityStateSynchronizationBar (Fork)SynchronizationBar (Join)Assign toCourseResolveConflictsTransitionUpdateScheduleMastering Object Oriented Analysis and Design with UMLCopyright © 2003 Rational Software, all rights reserved 18An activity diagram may include the following elements:• Activity states represent the performance of an activity or step within theworkflow.• Transitions show what activity state follows after another.• Decisions evaluate conditions defined by guard conditions. These guardconditions determine which of the alternative transitions will be made and, thus,which activities are performed. You may also use the decision icon to showwhere the threads merge again. Decisions and guard conditions allow you toshow alternative threads in the workflow of a use case.• Synchronization bars show parallel sub-flows. They allow you to showconcurrent threads in the workflow of a use case.3 - 18