The technical book "Improvement of Methods for Assessing the Condition of Rotor Equipment" offers a comprehensive analysis of the methods for evaluating the condition of rotor systems. It addresses the necessity of transitioning from a time-based maintenance approach to a condition-based system in order to optimize operating costs and enhance the efficiency of maintenance processes. The author, Vil' Yamaliev, explains the challenges and benefits of this transition and provides practical recommendations for implementation. The book is particularly relevant for professionals in the fields of engineering and IT who are involved in the maintenance and operation of machinery and equipment. It contains valuable information for accurately and reliably assessing the technical condition of mechanisms during operation, without the need for shutdown or repair. The diagnostic rules and forecasting techniques presented allow for the evaluation of the remaining lifecycle of machines and ensure their reliable operation over the intended period.