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. Use Case diagram (uc): A Use Case diagram shows communications among system transactions ( Use Cases) and external users ( Actors) in the context of a system boundary ( Subject notation: rectangle).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. Use Cases are sometimes considered high-level functional requirements. Use Case: A Use Case (notation: oval/ellipse) represents a system transaction with an external system user, called an Actor (notation: stick-figure). What is a SysML Use Case diagram? Definitions * Apply MBSE + SysML Requirements Transitive Trace Pattern to scale system Requirements traceability on the 'Left-Hand-Side' of the System V-Model. * Apply MBSE + SysML Requirements Cluster Pattern to manage FR-NFR complexity. Compare and contrast bona fide «designConstraint» Requirements (e.g., '. * Regurgitate System Design decisions as SysML Requirements text. * Satisfy all Functional Requirements with Functional Activities using the «satisfy» Dependency. * Conflate «functionalRequirement», «performanceRequirement», and «designConstraint» Requirements. * Aggressively apply Requirements Triage techniques to separate «functionalRequirement», «performanceRequirement», and «designConstraint» Requirements. The purpose of Requirement diagrams is to specify both Functional and Non-Functional Requirements within the model so that they can be traced to other model elements that Satisfy them and Test Cases that Verify them. Requirement diagram (req): A SysML Requirement diagram is a static structural diagram that shows the relationships among Requirement («requirement») constructs, model elements that Satisfy («satisfy» Dependency) them, and Test Cases that Verify («verify» Dependency) them. SysML predefines the following stereotype specializations of NFRs: A Functional Requirement (functionalRequirement» keyword) specifies a function that a system must perform, whereas a Non-Functional Requirement (NFR) specifies quality criteria that can be used to test the effectiveness of system functions. Requirement: A Requirement (notation: rectangle with «requirement» keyword) is a capability or condition that a system must ('shall') satisfy. What is a SysML Requirement diagram? Definitions Whereas Activity, Sequence and State Machine diagrams are Turing Complete, and their dynamic behavior can be simulated or executed, Use Cases diagrams are not Turing Complete and are not simulatable. *: Although Use Case diagrams are generally classified as Behavior diagrams by both the OMG SysML and UML 2 specifications their Behavioral semantics are ambiguous and incomplete.

When properly defined and applied Parametric diagrams are capable of Mathematical ModSim no other SysML or UML 2 diagrams are capable of this. Mathematical ModSim, Mathematical M&S, Parametric Simulation) refers to the capability of a computer program to execute the a mathematical model of the behavior of a system of interest, where the model is defined as a set of mathematical equations. ‡: Mathematical Modeling & Simulation (a.k.a. In general, with the exception of Use Case diagrams, SysML and UML 2 Behavior diagrams are potentially capable of Dynamic System Simulation. Dynamic System Simulation) refers to the capability of a computer program to execute the time-varying behavior of a system of interest.

The SysML is composed of nine (9) diagram types and Allocation Tables for mapping language elements across diagram types: DIAGRAM PROPERTIES

Modelio vs papyrus vs cameo