The focus of this book is to cover the fundamentals, methodological approaches, and diverse applications of smart systems. Smart Systems discusses important topics such as the Internet of Things-enabled smart systems, artificial intelligence, ergonomics, digital twin, and quality assurance frameworks in smart systems. It addresses methodological approaches in diverse sectors such as service, agriculture, product design, and development. This book: Discusses important concepts such as customer satisfaction, product design, and product lifestyle management in a comprehensive manner Presents methodological techniques like optimization approaches, qualitative approaches, and multi-criteria decision-making Examines critical issues, including sustainability, ergonomics, quality assurance, and accuracy Covers the Internet of Things-enabled smart systems and artificial intelligence in smart systems Elaborates on management strategies, and quality assurance framework for smart systems The text is primarily written for senior undergraduate/graduate students, and academic researchers in the fields of mechanical engineering, manufacturing engineering, industrial engineering, production engineering, and aerospace engineering.