These additional capabilities include branching, parallel flow, swimlane, etc.īefore drawing an activity diagram, we must have a clear understanding about the elements used in activity diagram. Activity diagrams are not exactly flowcharts as they have some additional capabilities. The purpose of an activity diagram can be described as −ĭescribe the sequence from one activity to another.ĭescribe the parallel, branched and concurrent flow of the system.Īctivity diagrams are mainly used as a flowchart that consists of activities performed by the system. It shows different flows such as parallel, branched, concurrent, and single. Although the diagrams look like a flowchart, they are not. Activity diagram is sometimes considered as the flowchart. It does not show any message flow from one activity to another. Thing in the activity diagram is the message part. Activity diagrams are not only used for visualizing the dynamic nature of a system, but they are also used to construct the executable system by using forward and reverse engineering techniques. Other four diagrams are used to show the message flow from one object to another but activity diagram is used to show message flow from one activity to another.Īctivity is a particular operation of the system. It captures the dynamic behavior of the system. The basic purposes of activity diagrams is similar to other four diagrams. Activity diagrams deal with all type of flow control by using different elements such as fork, join, etc Purpose of Activity Diagrams This flow can be sequential, branched, or concurrent. The control flow is drawn from one operation to another. The activity can be described as an operation of the system. Activity diagram is another important diagram in UML to describe the dynamic aspects of the system.Īctivity diagram is basically a flowchart to represent the flow from one activity to anotherĪctivity.

Activity diagram doctor