Model-based systems engineering is a formal methodological approach to systems engineering that elevates the use of integrated, authoritative system models as the primary means of information exchange and understanding across the entire system lifecycle. This paradigm investigates and facilitates the rigorous specification, design, analysis, verification, and validation of complex systems by employing models to capture system structure, behavior, requirements, and constraints. Its significance resides in enhancing interdisciplinary communication, improving system comprehension, effectively managing complexity, and enabling early identification and mitigation of potential design flaws.