The article discusses how Model-Based Systems Engineering can help develop large-scale complex systems like transportation and defense more efficiently. By using a structured approach that includes analyzing requirements, functions, and interfaces, the researchers were able to successfully apply this method to an Automated Guided Transit system. They also extended the model-based tool to manage project organization and product design knowledge, leading to increased productivity and effectiveness in system design. The study demonstrates the benefits of using computer-aided tools in the railway industry for better system integration and lifecycle management.