The article considers the main prospects for the use of the method of coating plasma spraying. The essence of plasma spraying is disclosed, and the main advantages and disadvantages of this coating formation method are indicated. The method is characterized by high productivity and the possibility of forming high-quality coatings on machine parts for various functional purposes. It was found that the low stability of the spraying process, the structural complexity of the plasmatron and the need for mathematical modeling are constraining factors in designing new technological processes of plasma spraying. The possibility of further increasing the efficiency of plasma spraying by developing methods and means of automation and computerization of the spraying process is substantiated. Obtaining the required physical and mechanical properties of coatings applied to worn working surfaces of machine parts by plasma spraying is achieved by using modern electronic computing machines in the development of technological application processes. Based on the research a mathematical model for evaluating the method of plasma coating deposition was obtained. It allows the choice of applied materials and technological processes, as well as modeling options of design and technology solutions that meet the optimization condition. The data obtained from the results of studies allow evaluation of the impact of technological modes of coating formation on the optimization parameter.