Common usages of an activity diagram in SysML includes: Thus, it is typically used to specify behavior, with a focus on the flow of control and the transformation of inputs into outputs through a sequence of actions. An activity diagram is particularly good at expressing the flow of objects-matter, energy, or data-through a behavior, with a focus on how the objects can be accessed and modified in the execution of that behavior during system operation. ![]() However, each one has strengths and weaknesses that make it more or less appropriate based on the needs of your target audience.Īctivity diagrams can express complex control logic better than sequence diagrams and state machine diagrams. All three can express sequential and concurrent behaviors and event occurrences over time. In SysML, an activity diagram is inherited from UML with some minor modifications.Īctivity diagrams, sequence diagrams, and state machine diagrams are the three options that SysML offers you to specify system behavior.
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