This handbook is fully updated to the 2018 Body of Knowledge for the Certified Reliability Engineer (CRE), including the new sections on leadership, performance monitoring, root cause analysis, and quality triangles. Its purpose is to assist individuals preparing for the examination and to provide a reference for the practitioner. Several typical examples are provided throughout based on the collective experience and knowledge of the authors and editor. The chapters and sections are numbered by the same format used in the Body of Knowledge (BoK) for the CRE examination. It also includes a comprehensive glossary of reliability-related terms and appendices with, among other things, various useful distribution tables.