PERSPECTIVES AND DISCLAIMER •The information and opinions presented here are drawn from my personal network and experiences and do … History Recommendation for the main behavior which controls other behaviors is to use State Machine Diagram. State Machine diagram can be enriched with other behaviors e.g. What is a SysML State Machine diagram? Region. Choice. When you are constructing SysML models, you can populate the StateMachine diagrams using the icons on the 'SysML StateMachine' pages of the If set to non-selectable, the frame will auto-resize to fit the bounds of the diagram, expanding from its default size but not shrinking smaller.Note that diagrams showing Diagram Frames applied under release 14.0 or higher of Enterprise Architect will draw the parent object on the diagram when opened in a release prior to release 14.0.Declares the ending state of the StateMachine, and its completion.Declares a Junction with a mandatory 'else' transition.Represents the last active State of the StateMachine prior to its interruption.Declares a decision point at which a Transition branches out into multiple guarded, alternative paths.Declares an Entry point between StateMachines, SubstateMachines and Regions.Declares an Exit point between StateMachines, SubstateMachines and Regions.Declares a termination State in which the StateMachine no longer operates.Simultaneously branches and joins a set of Transitions.Establishes a life-cycle path between one State and another, based on its operational conditions.A specification of Send request instances communicated between objects.Indicates an event that initiates an action (and might arise from completion of a previous action). Stencil: State Machine Diagram (SysML 1.5) Tags: region. Detlef Götting Hamburg University of ecThnology (TUHH) echnischeT Universität Hamburg-Harburg Institute for Software Systems 21073 Hamburg. Initial. However, each one has strengths and weaknesses that make it more or less appropriate based on the needs of your target audience.Activity 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. Common usages of an activity diagram in SysML includes:Show the flow of an object from one activity (or action) to another activity (or action).Portrays the beginning of a set of actions or activitiesStop all control flows and object flows in an activity (or action)Represent an object that is connected to a set of Object FlowsRepresent a test condition to ensure that the control flow or object flow only goes down one pathBring back together with different decision paths that were created using a decision-node.Split behavior into a set of parallel or concurrent flows of activities (or actions)Bring back together with a set of parallel or concurrent flows of activities (or actions).A way to group activities performed by the same actor on an activity diagram or to group activities in a single threadThe figure below specifies how the Air Compressor interacts with the external systems, including the Air Tool, the Atmosphere, and indirectly with the Operator.The Block Definition Diagram includes a block called the Air Compressor Context that is composed of the Air Compressor and the entities that are external to the Air Compressor representing the user (Operator), external system (Air Tool), and the physical environment (Atmosphere).The Air Compressor and the external systems are shown as activity partitions.The Compress Air action is further decomposed. Composite State. State: A State (notation: rounded-rectangle a.k.a. start activity on enter to state, or execute code as effect of switch between states. The activity partitions in this activity diagram correspond to the four components of the air compressor as shown in the Swimlane Activity Diagram below:The low-pressure air input and high-pressure air output are consistent with the input and output of the Compress Air action contained in the Behavior package along with the Operate Air Tool activity in the previous high-level activity diagram example.We use cookies to offer you a better experience. UML state machine, also known as UML statechart, is a significantly enhanced realization of the mathematical concept of a finite automaton in computer science applications as expressed in the Unified Modeling Language (UML) notation..