Model-Based Systems Engineering (MBSE), which tackles architecting and design of complex systems through the use of formal models, is emerging as the most critical component of systems engineering. This textbook specifies the two leading conceptual modeling languages, OPM-the new ISO 19450, composed primarily by the author of this book, and OMG SysML. It provides essential insights into a domain-independent,discipline-crossing methodology of developing or researching complex systems of any conceivable kind and size. Combining theory with a host of industrial, biological, and daily life examples, the book explains principles and provides guidelines for architecting complex, multidisciplinary systems, making it an indispensable resource for systems architects and designers, engineers of any discipline, executives at all levels, project managers, IT professionals, systems scientists, and engineering students.

Ready to Start Modeling?.- Text and Simulation Enhancements.- Connecting Things with Links.- SysML: Use Case, Block, and State Machine Diagrams.- Refinement through In-Zooming.- The Dynamic Aspect of Systems.- Controlling the System's Behavior.- Abstracting and Refining.- Conceptual Modeling: Purpose and Context.- Things: Objects and Processes.- Object-Process Language: The Text.- SysML: Foundations and Diagrams.- The Dynamic System Aspect.- The Structural System Aspect.- Participation Constraints and Forks.- Fundamental Structural Relations.- Aggregation-Participation.- Exhibition-Characterization.- States and Values.- Generalization and Instantiation.- Complexity Management: Refinement and Abstraction.- OPM Operational Semantics and Control Links.- Logical Operators and Probabilities.- Overview of ISO 19450.