Book excerpt: Industrial Engineering is the development of methods and techniques to make industrial processes faster and efficient. It seeks to simplify the workings of cohesive organizational systems of money, people, knowledge, material, machines, etc. and improve productivity. It integrates principles from diverse fields like management science, ergonomics, manufacturing engineering, operations research, financial engineering and many others to design efficient work systems. This book aims to present theories related to the field of industrial engineering in comprehensive detail. It also presents modern tools and techniques that have been adopted due to recent technological progress. It attempts to understand the multiple branches that fall under the discipline of industrial engineering and how such concepts have practical applications. Scientists and students actively engaged in this field will find this book full of crucial and unexplored concepts.