This book provides an overview of current subjects and research areas in tolerance management, targeting researchers who are working in the field of tolerance management or who wish to enter this domain. Experts from different areas of tolerance management will provide insights into their research fields, highlighting both the current state of research and emerging challenges. The book comprises four parts, which address different aspects of tolerance management. Part 1 is dedicated to the various interconnected tolerance management activities, the role of Key Characteristics, early tolerance management, and Robust Design. Part 2 deals with advanced tolerance analysis and tolerance synthesis methods, with a focus on tolerances in mechanisms as well as tolerance-cost optimization. In Part 3, tolerance analysis methods for non-geometrical Key Characteristics are presented, covering use cases such as rolling bearings and the validation of functional limiting positions. Finally, Part 4 deals with process- and operation-oriented tolerance management, taking a closer look at tolerance management in additive manufacturing, composite structures, and Tolerance Management 4.0. For the first time, tolerance management, its diverse subject areas, the current state of knowledge, and the upcoming challenges are brought together in such a holistic way in one edited volume. With this anthology, researchers and experts worldwide are able to gain deep insights into tolerance management and its various topics, as well as discover the most current aspects and methods of tolerancing research.