Activity diagrams enable you to model system dynamics. An activity diagram is a flowchart that describes the flow of control from one activity to the next. You can show sequential and/or concurrent steps of a process, model business workflows, model the flow control of an operation, or the flow of an object as it passes though different states at different points in a process. Unlike interaction diagrams (such as sequence and collaboration) that emphasize the flow of control between objects, activity diagrams emphasize the flow of control between activities.
Related Topics:
Working with Sequence Diagrams
Working with Collaboration Diagrams