The efficiency of vehicle operation largely depends on the quality of the spare parts used in the maintenance and repair of vehicles. The significance of the factor under consideration is determined by the complex influence on the economic indicators of vehicle operation and on traffic safety indicators. One of the measures aimed at improving the efficiency of operation is the organization of input quality control of spare parts. The costs of conducting and technological complexity of the input control vary significantly for different controlled objects, the effect of its implementation is ambiguous, which determines the relevance of the task of evaluating the effectiveness and expediency of its organization. Based on the urgency of the problem, the aim of the study is to improve the efficiency of the operation of motor vehicles by determining the optimal parameters of the input quality control system for spare parts. The hypothesis is put forward that the introduction of quality control of spare parts in the production cycle of motor transport and service enterprises will increase the efficiency of vehicle operation. To achieve this goal, a mathematical model for evaluating the effectiveness of input quality control of spare parts has been developed. Based on the parameters of the developed model, the target function of the study is de-termined, and restrictions due to the operating conditions of vehicles are established. Based on the results of the analysis of the assessment of the significance of factors that determine the efficiency of transport activities, it is proposed to use the value of total costs, including the likely damage from missing a defective part, unit, or unit, as the main criterion for the effectiveness of input quality control of spare parts . On the basis of the created mathematical model, a methodology for evaluating the feasibility of organizing input quality control of spare parts used in the maintenance and repair of vehicles is developed To confirm the proposed hypothesis, the adequacy of the developed model was checked. One of the largest passenger motor transport enterprises of the city of Orenburg — CJSC «Avtokolonna 1825» was chosen as the base for the study. As a model unit, the gimbal transmission of buses of the KaVZ family is considered. It is established that the direct costs of organizing the input control of this node are compensated by the savings due to the increased reliability of vehicles. But, based on the fact that this reduces the likelihood of road accidents caused by the failure of the cardan transmission, conclusions are drawn about the feasibility of organizing input control.
Determination of conditions for frequency adjustment of maintenance (M) and routine repair (RR) of electrical equipment under risk-oriented strategy of technical operation