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Model-Based Systems Engineering (MBSE) is a systems engineering process paradigm that emphasizes the application of rigorous architecture modeling principles and best practices to Systems Engineering activities throughout the System Development Life Cycle (SDLC).

These systems engineering activities include, but are not limited to, requirements analysis, system (functional) analysis, performance analysis (trade studies), system design, system architecture specification, and system Verification & Validation.

Systems Modeling Language (SysML) is a general-purpose system architecture modeling language for systems engineering applications, commonly used in conjunction with MBSE. In fact, after a decade of pragmatic experience applying SysML to tough Systems Engineering problems, SysML has emerged as the de facto Model-Based Language choice for MBSE projects.

SysML supports the specification, analysis, design, verification, and validation of a broad range of systems and systems-of-systems.

These systems may include hardware, software, information, processes, personnel, and facilities.

The advantages of SysML over its predecessor UML for systems engineering become obvious when considering a concrete example, like modeling an automotive system. With SysML systems engineers can use Requirement diagrams to efficiently capture functional, performance, and interface requirements, whereas with UML one is subject to the limitations of use case diagrams to define high-level functional requirements.

Additionally, with SysML engineers can use Parametric diagrams to precisely define performance and quantitative constraints like maximum acceleration, minimum curb weight, and total air conditioning capacity. UML provides no straightforward mechanism to capture this sort of essential performance and quantitative information.

Another advantage of SysML is SysML is a comparatively smaller language that is easier to learn and apply. Since SysML removes many of UML’s software-centric constructs, the overall language measures smaller both in diagram types and total constructs.

Also, SysML allocation tables support common kinds of allocations. Whereas UML provides only limited support for tabular notations, SysML furnishes flexible allocation tables that support requirements allocation, functional allocation, and structural allocation. This capability facilitates automated verification and validation (V&V) and gap analysis.

Want to learn more? Tonex offers Hands-on MBSE and SysML Training Workshop with Modelio, a 5-day course that teaches participants how to implement essential MBSE and SysML modeling concepts through case studies, hands-on sessions and exercises with Modelio tool supporting Systems Modeling Language (SysML) modeling functional requirements, structural model, low level design model, behavioral model, parametrics & simulation.

For more information, questions, comments, contact us.

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