The book "Calculated models of ensuring the operability and efficiency of transport and technological machines in operation", written by a team of authors edited by B. K. Bityukova is an important work in the field of engineering and technology, which will be of particular interest to specialists, students and researchers working in the field of transport and technological machines. This publication not only enriches the theoretical base, but also offers practical solutions that contribute to improving the efficiency of machines in various operating conditions. The main theme of the book is the development and application of calculation models that help to assess the performance and efficiency of transport and technological machines. The authors deeply analyze various aspects related to the operation of machines, including the influence of external factors, technical characteristics and features of work in real conditions. Readers will be able to find in the book useful recommendations for optimizing processes, which makes it an indispensable tool for engineers and managers engaged in the operation and maintenance of equipment. The book will be of interest not only to professional engineers, but also to technical students, graduate students and anyone who seeks to deepen their knowledge in the field of machines and technologies. It is suitable for those who are just beginning their journey in this area, and for experienced professionals who want to update their knowledge and get acquainted with modern approaches and methods of analysis. The topics that are raised in the book cover a wide range of issues related to the operation of transport and technological machines. The authors consider methods for assessing reliability, analyze factors affecting performance, and propose models that allow predicting the behavior of machines in different conditions. This makes the book relevant for professionals working in areas such as logistics, construction, agriculture and many others where transport and technological machines are used. The style of the authors is distinguished by the clarity and accessibility of the presentation, which makes it easy to assimilate even the most complex concepts. Each section of the book is accompanied by examples and illustrations, which makes the material more visual and understandable. In. K. Bityukov, as an editor, was able to unite the efforts of the team of authors, which allowed to create a holistic and logically structured work. In addition, the book "Calculated models of ensuring the operability and efficiency of transport and technological machines in operation" can be useful for scientific research and development of new technologies. It opens new horizons for understanding the processes taking place in machines and offers innovative approaches to their analysis and optimization. This edition will be an excellent addition to the library of any specialist working in the field of engineering and technology. If you are looking for information on how to improve the efficiency of transport machines, optimize their operation or just want to deepen your knowledge in this area, this book will become your reliable assistant. Do not miss the opportunity to get acquainted with unique calculation models and methods that will help you in your professional activities .