The authors of the present book have examined organizational and technological principles and scientific methods of testing agricultural technological processes. The discuss in detail modern methods of agricultural technological evaluation, power rating, operational and technological evaluation and economic estimation of agricultural machines and complexes. They also describe methods for estimating the reliability of agricultural machines and the working conditions for machine operators. The authors have introduced the fundamentals principles of systems analysis and methods for forecasting the effectiveness of an agricultural technological process in the testing stage. The book will be useful for engineers and technicians involved in the research and development, and testing agricultural technological processes.