Activity diagrams, sequence diagrams, and state machine diagrams are the three options that SysML offers. Class Activity class activity activity diagrams problem customer can insert the card and enter his pin in any atm machine. In SysML, an activity diagram is inherited from UML with some minor modifications. The Activity diagram (like any diagram) can be viewed as an Element List, which makes working with element properties easier.ĭiagram Filters can also be used when presenting the diagrams, to draw attention to parts of the diagrams, and the diagrams can be presented in hand drawn or whiteboard style by changing the properties of the diagram. An activity diagram is a kind of behavior diagram it’s a dynamic view of the system that expresses sequences of behaviors and event occurrences over time. There is a toolbox that contains a range of elements, relationships and Patterns for creating the models. Together with the use case diagram and the state diagram, it belongs to the group of so-called behavior diagrams. Forks and Joins can be added to split and reunite the flow of control and objects added to show how data is supplied and consumed.Īctivity diagrams can be drawn at different levels of formality, from a Basic Flow Chart style of diagram used to represent a simple Business Process to a sophisticated Action-based diagram that can be used to model a complex system. An activity diagram is a means of expression of the Unified Modelling Language (UML), with which temporal processes within a system are described. Decisions and Merges can be used to model choice and to further control the flow through the Activity. The steps are connected by Control Flow relationships that show the sequencing of the steps. This includes business and technical processes and also computer algorithms. The Activity diagram can be used to model any business or technical activity or notion that has a series of steps. Project Browser Context Menu | Add Diagram. Project Browser Toolbar : New Diagram icon > UML Behavioral > Activity Ribbon: Design > Diagram > Insert > UML Behavioral > Activity A process hierarchy can be constructed by nesting Activities in the Project Browser and using the child diagram functionality to enable drill down from the value chain level to the lowest level processes. By connecting the Activities, Decisions and Forks with connectors (Control Flows) a sequence of elements can describe the business process. The elements can be given a name and detailed descriptions can be added to the notes. Activity diagrams can be used to model Business Processes as a UML alternative to the BPMN Business Process diagram and have the same ability to create a hierarchy of Activities in the Project Browser. It is a more sophisticated version of its close cousin the Flowchart diagram. The Activity diagram is one of the Unified Modeling Language (UML) Behavioral diagrams that can be used to model a process or algorithm as a sequence of steps.
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