This text describes an integrated process for designing, developing, operating and maintaining models and simulations to support mission objectives. It emphasizes the use of sound principles from systems engineering, describes the process and tools needed to create effective products, and provides insights to help you apply modelling and simulation (M&S) creatively. Using advice from experts across industry, government and academia, you'll be able to: identify workable objectives and define meaningful requirements; translate objectives and requirements into cost-effecetive concepts and good preliminary designs; develop, verify and test your system; and attend to detail throughout the effort and document compliance with requirements.