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The existing strategies of maintenance and repair are discussed and a new strategy based on the control of the residual life is presented. It is assumed that in the future, the main maintenance and repair operations will be focused on minimizing this residual life, i.e. on the increase in the service life. It is proved that this maintenance organization strategy for the maintenance and repair optimization allows minimizing the flow of random failures of components during operation and increasing their service life (for a group of the same components) to a maximum. The work on the selection and justification of the life parameters controlled in this strategy has been performed.

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The paper presents the problems of forming a system of utilization of equipment in various sectors of the national economy, as well as ways to solve them. The problem of waste management in the agro-industrial complex is one of the key environmental problems due to the fact that waste, as a rule, contains secondary resources - useful substances and materials, the irrational use of which significantly affects their economic efficiency. In the country’s agriculture, this issue is especially acute, since the agro-industrial complex solves the problem of the country’s food security. The developed system of functioning of the technical potential of the agro-industrial complex makes it possible to reduce violations of environmental safety in production, namely: pollution of land, atmospheric air, water bodies, damage (destruction) of green deposition and other types of environmental damage.

The article presents three strategies for maintenance and repair of machines that control the pre-selected and justified parameters of the technical condition of the machine, as well as the costs of eliminating failures for these strategies and the possibility of reducing them. (Research purpose) The research purpose is to identify the most effective way to determine the residual life of machine parts. (Materials and methods) The article proposes a strategy for maintenance and repair of machines, in which a special place is occupied by ways of reducing the mechanical friction losses, increasing the efficiency of the machine and the service life of its parts. The article notes that in order to meet the service life, it is necessary to monitor their remaining life visually or using appropriate sensors. In order to determine the remaining resource in more accurately way, we suggested that it would be measured several times, preferably using different methods or devices. Authors designed a computer program that allows to estimate the remaining resource using an interval estimation of random values for a given probability of failure-free operation of the machine part. The plunger pairs of a high-pressure fuel pump were chosen as the object of research. As a diagnostic parameter that characterizes the technical condition of the pump, its starting cycle feed was used, the value of which was determined on different stands. (Results and discussion) Article presents the values of the average resources of the plunger pairs, their dispersion around the corresponding average values, and calculated their average residual resource as an interval estimate for a given probability of failure-free operation. (Conclusions) The research results have shown a possibility of using the residual resource as the basis of the proposed strategy for maintenance and repair of machines based on minimizing the residual resource of their parts. The most important unsolved task for this strategy remains the selection and justification of primary diagnostic sensors for assessing the residual life of machine parts.