Business Process Management (BPM, Business Process Management), or process management, is an advanced management discipline that considers the optimization and continuous improvement of business processes (or administrative regulations in the case of state and municipal authorities) as the key to improving all components company efficiency. The book examines the key concepts of process management and outlines its main approaches and methods. Among the literature on BPM, the “Body of Knowledge” occupies a special place due to its competence: it does not provide original proprietary methods, but only practice-tested methods approved by leading experts of the Association of Business Process Management Professionals (ABPMP, www.abpmp.org). Version 4.0 includes new topics such as agile methodology, process repositories, minimal programming, RPA, blockchain, artificial intelligence, machine learning, Internet of things. The appendices have been supplemented with a competency model and a standard BPM training program. The book is intended for managers at all levels, business analysts, business process management specialists, information technology specialists, teachers, graduate students, students and anyone interested in the process approach to management. The professional standard “Process Management Specialist” and certification of specialists are based on the “Body of Knowledge”. BPM CBOK is a reference book for any organization planning process management initiatives.