This book aims to present a state-of-the-art survey of theories and methods of ontology modelling in physical asset integrity management with emphasis on interoperability and heterogeneity, in a system that is composed of multi-subsystems. Ontology engineering promotes asset integrity concepts in order to improve the social sense of production sustainability and environment protection. It has made signifi cant contribution in advancing engineering tools and software for the development of physical asset integrity study. Physical asset integrity is a life cycle concept that is based on system engineering development process in order to maintain equipment functionality in an acceptance level in terms of safety, environment, and cost. Particularly, it becomes essential for those industries and nations that establish infrastructure development program and expect to effi ciently utilize them for the years to come. This book is about the current cutting-edge applications and research of ontology engineering techniques in physical asset integrity. This book is distinct from others because it addresses the new challenges of industries, industrial practitioners, and market needs toward complying with asset sustainable production with respect to asset integrity. Then, it offers a practical and theoretical framework to support those concerns by covering the main subjects, the tools, methods, and standards of that in practice. Throughout the book, guidelines are given for selecting the proper type of analytical techniques to use in a wide variety of situations. Additionally, extensive references to journal articles and other technical literature should assist the reader in applying the methods described. It begins by introducing basic concepts, showing their interrelationships, and then it covers more advanced topic such as the tasks that are necessary to assure health of complex equipment and systems with high quality and reliability requirements. The book includes eight chapters in which different tools, models, techniques, and methods of asset integrity management are included. Every chapter of the book provides a detailed description of each of the tools, offering the reader a brief synthesis of its conceptual and analytical foundations along with descriptive examples and references that facilitate the implementation of these tools on real applications.