SysML Information

SysML offers systems engineers the following advantages over UML for specifying systems and systems-of-systems: SysML expresses systems engineering semantics (interpretations of notations) better than than UML. It reduces UML's software bias and adds two new diagram types for requirements management and performance analysis: Requirement diagrams and Parametric diagrams, respectively. SysML is smaller and easier to learn than UML. Since SysML removes many software-centric and gratuitous constructs, the overall language is smaller as measured in diagram types (9 vs. 13) and total constructs. SysML model management constructs support the specification of models, views, and viewpoints that are architecturally aligned with IEEE-Std-1471-2000 (IEEE Recommended Practice for Architectural Description of Software-Intensive Systems). The following table compares SysML diagrams with their UML counterparts where one exists. Where no UML diagram counterpart exists for a SysML diagram (e.g., Parametric and Requirement diagrams), it is marked N/A; similarly, where no SysML diagram counterpart exists for UML diagram it is marked N/A (e.g., Communication diagram).