Repair Of Rolling Stock Research Articles

Optimization of Curve Correction in the Plan Using Computer Modeling to Improve Train Safety

Purpose. The authors intend to develop and implement innovative approaches to optimizing curve correction in the plan of railway tracks using computer modeling. This process aims to: improve traffic safety; improve the smoothness of the ride, which increases passenger comfort; eliminate speed limits on curved sections, which reduces travel time and increases railroad capacity; reduce track maintenance and rolling stock repair costs. The use of special software to simulate various scenarios of train traffic along the adjusted curves will allow us to assess the impact of the train flow structure on the speed, rolling stock dynamics, and track condition. Methodology. The study is based on the theory of mathematical modeling and numerical calculation methods. To find the best option for the reconstruction of railway sections, the line is considered as a complex system consisting of various infrastructure facilities. Due to their unsatisfactory technical condition, these facilities may limit the speed of traffic on certain sections. The solution to this problem is complicated due to the interdependence of such objects: the reduction of travel time on a particular section is not linear, and obtaining accurate results requires traction calculations taking into account various options for eliminating speed limits. Findings. A calculation algorithm for optimizing long sections of the railway plan is proposed. The algorithm allows to take into account the desired direction of shifts in the curves, which greatly facilitates the optimization process. An example of calculations based on the proposed algorithm is given, which demonstrates the effectiveness of the approach. Originality. The scientific and applied problem of optimizing the process of adjusting railway curves in the plan has been solved. This helps to improve the safety and speed of trains through the introduction of the latest computer modeling methods. Practical value. The implementation of the proposed technology for optimizing the railway plan will significantly increase the speed and safety of train traffic, as well as increase the throughput capacity of railway lines. This will be an important step for the integration of Ukrainian railways into the European transportation system.

Additive manufacturing — a new vector in the production and repair of rolling stock

The influence of the fourth industrial revolution, known as Industry 4.0, on modern industrial production and social life is analyzed. The main advantages of Industry 4.0 are presented, such as increasing productivity and occupational safety, developing new products and materials, as well as increasing the competitiveness of products. Special attention is paid to additive technologies and their role in modern engineering within the framework of the Industry 4.0 concept. The methods of additive technologies, their classification by materials and production methods, as well as their various applications in various industries are described in detail. An example of the successful use of additive technologies is presented on the example of JSC Uralvagonzavod Scientific and Production Corporation, where molds and rods for casting parts with high speed and quality are created using 3D printers. The project of introducing 3D printers into the service depots of the directorate of motor car rolling stock of JSC Russian Railways is considered, with an emphasis on the economic and temporary benefits from the use of additive technologies. The concept of introducing additive technologies in the maintenance and repair of rolling stock involves the creation of support depots on the railway network of JSC Russian Railways. In conclusion, the importance of training highly qualified specialists in the field of additive technologies and the need to develop educational programs to train future employees capable of solving complex tasks of creating and applying new industrial technologies is presented. Special attention is paid to synergetic approaches in education to combine learning with scientific activity and the creation of innovative technological solutions.

МЕТОДИКА ВОССТАНОВЛЕНИЯ РАЗМЕРНЫХ СВЯЗЕЙ ПРИ РЕГУЛИРОВКЕ КЛАПАННОГО ЗАЗОРА В МЕХАНИЗМЕ ГАЗОРАСПРЕДЕЛЕНИЯ АВТОМОБИЛЬНОГО ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

The relevance of research is due to the problems of organizing auto repair production in modern conditions associated with the difficulty of logistics and the high cost of foreign spare parts, which is confirmed by the analysis of domestic and foreign literary sources. Of particular importance in this case are the methods of optimizing the balance of costs for performing repair and restoration actions and replacing defective parts. The purpose of the work is to improve the quality of repair of rolling stock of road transport based on the use of methods for restoring dimensional connections. This study is designed to fill the existing knowledge gap caused by the lack of methods for restoring specific repair links. The use of new parts in repair, along with restored or used ones, necessitates the wider use of methods for optimizing the limit values of wear and recovery processes of dimension chain elements. The materials and methods of research are presented as an example of the development of a technique for restoring the necessary parameters of dimensional connections when adjusting the valve gap value, since the thermal gap in the timing mechanism of an internal combustion engine is an important element affecting the efficiency of the car engine. The scientific novelty of the work lies in the study of two different methods potentially suitable for implementation in the repair industry for restoring dimensional ties while reducing the valve gap by machining the outer or inner contact surfaces of car engine pushers. Studies have been carried out in relation to the decrease in the gap in operating conditions, which is widespread in automobile engines with overhead camshafts, since a decrease in the valve gap to a greater extent than an increase in it affects the efficiency of the machines. The equation of the size chain of the valve group is given, in which the valve gap is the closing link. As a result of sequentially discretely removing the surface layers of the pusher metal at 0.05 mm intervals and measuring the hardness of the surface layers, it has been found that this approach to restoring repair bonds can be recommended for use in auto repair production, with a more preferred method being to adjust the valve clearance by grinding the outer surface of the pushers. The data obtained can serve as the basis for further research in the development of a set of technologies for restoring specific size chains using repair kits that include parts with different manufacturing accuracy or that have been in operation.

Моделирование технического обслуживания и ремонта высокоскоростных электропоездов с использованием данных бортовых систем диагностики

Purpose: High–speed railway lines (HSRL) are the most promising direction of railway transport development in the 21st century, increasing the mobility of the population at a distance of up to 1000 km, contributing to the development of urban conglomerations. Reliable rolling stock is necessary for the functioning of the HSRL. The article describes the performed mathematical simulation of the operation and maintenance and repair system (MRS) of high-speed electric trains in relation to the St. Petersburg — Moscow landfill. The purpose of the simulation is to substantiate the requirements for MRS, including when using on-board automated systems for technical diagnostics. Methods: It is based on the principles of passenger traffic organization, technical requirements for domestic high-speed rolling stock, queue theory methods, as well as probabilistic mathematical modeling methods in MS Excel in the algorithmic language Visual Basic for Applications (VBA). The corresponding software has been developed. Results: A mathematical model and software have been developed, multifactor modeling has been performed, the degree of failure impact on the required fleet of high-speed electric trains has been determined. Methods of optimization of maintenance to reduce the required fleet are proposed. The requirements for the mathematical model itself are defined. A factor analysis of operation and maintenance has been performed by mathematical modeling. Practical significance: The guarantee of safe and reliable high-speed traffic is the creation of a modern system of maintenance and repair of rolling stock. The study of the interaction of operation and maintenance is very important in preparation for the launch of domestic high-speed traffic.

A Set of Products for Remote Control of Rolling Stock Characteristics

A modern specialist in the field of maintenance and repair of rolling stock needs to constantly have access to up-to-date information about the technical condition, equipment and location of serviced units. This article analyzes the existing software products and applications that allow you to plan and manage the processes of repair work and operation. The work is devoted to the creation of products for finding up-to-date information about the technical condition of rolling stock units both on a personal computer and in an online application environment. Programs have the ability to be updated and supported, including bug fixes. The use of the proposed tools will allow a specialist in the field of logistics, maintenance and repair of rolling stock to increase the efficiency of forecasting, organization of transport processes and repair work. The algorithms of operation of each software product are formed in the work. The algorithms are presented in the form of flowcharts. The generated database is presented. Geometric parameters and wheelset numbers, dates of the last maintenance and overhaul, location were added to the presented database in accordance with the number. An array of data with photos of car was also created. The article presents a text written in the Python programming language. This language made it possible to fully implement the algorithm of the products actions. During the testing of the programs, the operation of the main functions was checked, namely, the search for parameters by the composition number. The work solved the problem of displaying photos and videos on the screen at the users request. This function will reduce the time to choose a rolling stock unit for rent and control the quality of repairs. The results of the work of programs in the environment of online applications and on a personal computer are presented in the form of drawings. When creating a software product in an online application environment, the issue of data transfer security (whitelist, password encryption, end-to-end encryption, as well as copy and forwarding protection) was resolved.

Российский рынок вагоноремонтных услуг: конкурентоспособность субъектов в эпоху цифровизации

The study is devoted to the analysis of the domestic market for carriage repair services as well as the prospects of its development under the conditions of digitalization. The authors emphasized rolling stock repair due to the ongoing reform of this industry and its transfer to a competitive basis through the development of independent market agents as well as a fully competitive market. Passenger carriage repair is realized by internal departments of the company. As a result of the research, the directions of digital transformation in the freight car repair market were revealed. In particular, it was suggested to introduce electronic document management, the development of a unified electronic register of spare parts and performed works, and the creation of digital “twins” (electronic copies) of freight cars. These measures would greatly decrease the operating costs of rolling stock by streamlining the time to process information about their condition and simplifying procedures for planning maintenance, scheduled repairs, and unscheduled repairs. In the car repair services market, a digital ecosystem is formed as a result of the integration of such digital platforms as automatic control systems, portals of electronic document management, specialized portals, and electronic databases of spare parts and other components. This allows for connections between car repair enterprises, owners of rolling stock, the owner of infrastructure (OJSC Russian Railways), as well as other participants in the market under analysis. These transformations lead to higher service, help to avoid the usage of low-quality spare parts, increase repair quality, and, as a result, increase railway transportation security. The work demonstrates the economic effect of digital ecosystems used for document management and the interaction process between carriage owners and repair enterprises.

Reparability and labour intensity comparison for trolleybuses and buses maintenance and repair operations

Introduction. Trolleybuses and buses are the main type of railless public transport. This article examines the factors affecting the cost of transportation, in terms of maintenance and repair of rolling stock in detail. The main purpose of this study is to compare the values of labour intensity for maintenance and repair of trolleybuses and buses and to identify the reasons that affect the difference in the values of labour intensity for maintenance and repair of trolleybuses and buses.Materials and methods. To achieve this goal, the following tasks were solved: 1. The analysis of operating manuals, maintenance and repair instructions, valid during the corresponding periods of operation, for trolleybuses (ZIU-9, BKM-321, PKTS 6281) and buses (LiAZ-677, MAZ-103, MAZ-203) was carried out. The analysis and comparison were made for vehicles of three conditional generations: the 1970s - 1990s, 2000s and 2010s. 2. The reasons influencing the difference in the values of labour intensity of maintenance and repair of buses and trolleybuses are determined. 3. Proposals to amend Order No. 351 of the Ministry of Transport of the Russian Federation have been formulated.Discussion and conclusion. The comparison of the values of the labour intensity of the selected vehicles was made. The recommendations on changing the labor intensity values for maintenance and repair of trolleybuses in comparison with buses, established by Order of the Ministry of Transport of the Russian Federation No. 351, when calculating the initial minimum price of the contract for passenger service by trolleybuses and buses are given.Originality. The comparison of the complexity of performing maintenance and repair operations of trolleybuses and buses in the context of types of equipment and for vehicles of different technical generations is made.

CHOICE OF OPTIONS OF LOCOMOTIVE CHARACTERISTICS TAKING INTO ACCOUNT OPTIMUM EFFICIENCY

The saturation of the locomotive park of railways with various series of locomotives does not always correspond to their effective use given their inherent special characteristics. Modern conditions require all participants in design, construction, operation and repair to make correct and well-founded decisions. The variety of series of locomotives, which provide different requirements of economic activity, is not always the basis of their effective operation. This especially applies to locomotives that are purchased abroad. As the experience of their operation has shown, they are not always adapted to the real conditions of operation in our country. This is, first of all, their intensive exploitation and the lack of adaptability of the repair base to maintenance and repair of rolling stock. On the other hand, the capacity range, for example, of the freight locomotives that were purchased, does not correspond to the traditional ones, which take into account both the length of the warehouse and the length of the receiving-departing routes, etc. In our country, sufficient experience has been accumulated and there were appropriate conditions for a comprehensive coverage of the tasks of both design and construction of locomotives for the provision of industrial enterprises in freight transportation, as well as the population in intercity and suburban transportation. Unfortunately, there are many factors that currently make even the minimal needs for updating both the locomotive fleet and the modernization of the operational and repair activities of railway enterprises impossible. In these conditions, perhaps the most important task is the correct, justified choice of locomotive characteristics, taking into account its technical condition. The article deals with the procedure of forming requirements for the characteristics of locomotives based on the efficiency criterion. Based on the verification of the conditions of the corresponding substitutions for the dimensionless scales of the pure indicators of the locomotives, an effective set of some solutions is determined, on the basis of which the optimal solution is formed for the selection of locomotive characteristics for specific conditions of use. Based on specific data shown decision-making procedures regarding some characteristics of locomotives.

Methodology for substantiating the operational and production plan for the current repair of rolling stock

Methodology for substantiating the operational and production plan for the current repair of rolling stock

THE USE OF ARTIFICIAL NEURAL NETWORKS ON RUSSIAN RAILWAYS TO CONTROL CURRENT COLLECTORS OF TRAINS

Background. This article presents the results of the analysis of the mechanism of artificial neural networks on Russian railways for the control of current collectors of trains. A critical assessment of the situation was carried out and a forecast of the further development of neural network technologies in railway transport was given.
 Materials and/or research methods. Methods of mathematical modeling, system analysis, data analysis, comparison, systems theory, as well as architecture and mathematical model of neural network and information standards were used.
 Results. A model of the information system for monitoring the characteristics of current collectors has been developed, the algorithm of its operation and the functionality of the software package of the model of the system for monitoring the characteristics of current collectors of rolling stock have been described. The algorithm of neural network operation for determining the characteristics of electric rolling stock current collectors is presented. The analysis of the prospects for the use of artificial neural networks in the field of railway transport has been carried out, and a simulation model of an information system for monitoring the characteristics of current collectors of electric rolling stock of railway transport has been created.
 Conclusion. The article examines the positive experience of JSC “Russian Railways” on the introduction of neural network technologies in technological processes and further prospects for the use of neural network technologies on Russian railways. The necessity of intensifying the development and implementation of neurotechnologies to solve a wide range of tasks, including tasks to optimize the organization of maintenance and repair of rolling stock, is noted. The effectiveness and relevance of the use of artificial neural networks in various fields of activity, especially on Russian railways, is shown, and a model of an information system in the field of monitoring the characteristics of current collectors is proposed.

Improving the material and technical base of railway transport enterprises: the economic feasibility of using alternative equipment for the repair of rolling stock

Improving the material and technical base of railway transport enterprises: the economic feasibility of using alternative equipment for the repair of rolling stock

ФУНКЦИОНАЛЬНАЯ АРХИТЕКТУРА ЦИФРОВОЙ МОДЕЛИ ТЕХНИЧЕСКОГО ОБСЛУЖИВАНИЯ И РЕМОНТА ГРУЗОВЫХ ВАГОНОВ

Introduction of complex digitalization of car services is determined by progressive development of railway transport. Dynamically developing software products form inseparable requirements to transformation of the industry and dictate inevitable changes in the production architecture. Digitalization of production processes and their internal connections integrates more deeply into technology of maintenance and repair of rolling stock and becomes a basic principle of a production cycle of any level. For forecasting a technical condition of freight cars the authors suggest a model of a system for their phased maintenance and repair. A simulation created in the digital form describes the model that allows repeatedly calculating various production scripts at various given conditions and giving an optimal forecast of final indicators of maintenance and repair of a car without resorting to natural assessment of the result.

Influence of production specialisation level on efficiency of technical service and safety of buses operation

Introduction. The focus is on improving the maintenance and repair system of city buses on the scale of large cities in particular and regions in general. Due to the increase in the number of rolling stock, the load on the existing technical service organisations increases, which in turn leads to their overload. Consequently, the efficiency and safety indicators of bus operation are reduced. The proposed solution is to develop a system of centralised specialised production.Materials and methods. The system of maintenance and repair is considered from the point of view of the marginal utility theory. Dependences of total and marginal utility on the quantity of goods (services) are presented. The term ‘specialization’ is described from the point of view of the motor transport industry. The necessity of combining universal and specialised posts is justified.Results. The results of the experimental study on ten passenger enterprises are presented. The results of calculations of the efficiency indicators of the current repair area are given. The dependence of annual costs and profit of the current repair zone of ten posts on the level of specialisation is reflected. The dependence of the coefficient of technical readiness of buses on the scale of parks in Russia is analysed. The natural factors, influencing the coefficient of technical readiness are presented. An adequate mathematical model with physical variables of the dependence of the coefficient of technical availability on the scale of the enterprise and the level of specialisation was obtained with further processing and verification of the results.Discussion and conclusions. The results of the study are intended for the enterprises of passenger transport. The data obtained will allow to develop a system of cooperation of technical service production facilities in order to improve the performance of requests for maintenance and repair of rolling stock.

Development of a Semiconductor Time Relay for Locomotives

Purpose. The need to replace the outdated element base of locomotive electrical apparatuses is urgent under conditions of locomotive overhaul to extend their service life. The main aim of the work is to reduce costs for the operation and repair of rolling stock by increasing the reliability of electrical apparatuses, the introduction of unified technical solutions. Methodology. Using the system-historical approach, the advantages and disadvantages of the main design principles of electrical apparatuses of locomotives are found out. The improvement directions of the elemental base of the time relay have been determined. The need to develop unified technical solutions for the implementation of locomotive time relays is substantiated. Using the methods of applied theory of digital machines and circuit engineering, a semiconductor time relay for locomotives was developed, which provides the possibility of implementing 23 options for time delay without changing the relay design. The proposed methodology allows designing universal electronic relays with any ranges of time delays. A combination of binary counters and a multiplexer is used as the main elements of the time delay control. The absence of elements of control capacitance and active resistance (RC circuits) in the scheme of the proposed semiconductor time relay allows ensuring the stability of the time relay characteristics over the entire operating interval, reducing the maintenance and repair costs of electrical apparatuses. Findings. A unified time relay with a wide range of time delay and the possibility of connecting electrical circuits of locomotives with a supply voltage of 50 and 110 V has been developed. The obtained results make it possible to predict the further development of semiconductor time relays and to apply the developed semiconductor (electronic) time relay for all types of railway rolling stock. Originality. In the work, the development of technologies and the element base of locomotive electrical apparatuses were analysed. The need to improve the element base of electrical apparatuses is substantiated using a time relay example. Practical value. Based on the proposed technical solutions, it is possible to produce a universal semiconductor time relay for locomotives.

Operational management of the bus fleet maintenance and repair system

Introduction. Recently, due to the increase in the number of vehicles, including public transport, there is a need to streamline the system of maintenance and repair, taking into account the mass of incoming applications for these operations. A decrease in productivity may occur due to an unclear distribution of work by performers, inconsistency of their actions in time and irrational use of technological equipment. The purpose of the research is to develop a system for organizing maintenance and repair of rolling stock based on the principles of centralization and cooperation with other production structures. To achieve this goal, statistical methods, methods of the theory of random processes and queuing theory are used. The concentration of production occurs either due to the growth of the share of large enterprises in the total volume of production of the region / industry (transportation of passengers of the metropolis) or due to the growth of the size of the manufacturing enterprises themselves. The process of concentration can be argued from the standpoint of the principles of synergetics.Materials and methods. The article discusses the operational management of the system of maintenance and repair of the bus fleet. The division of tasks of the technical service of a motor transport enterprise into four complexes is presented. Two ways of drawing up a schedule are analyzed: calendar and by actual mileage of cars. The analysis revealed the advantages and disadvantages of each of the options. The advantages and disadvantages of universal and specialized posts are analyzed, indicating ways to eliminate the identified shortcomings. The positive effect of centralization of management of the specified complexes of tasks for maintenance and repair of rolling stock is substantiated.Results. A scheme for servicing applications for routine repairs with decentralized and centralized systems for managing the production of routine repairs of rolling stock is proposed. The basic principles of functioning of a centralized production management system are described. A general structural scheme of centralized specialized production is proposed. The structural composition of the pre-production complex is presented, with a description of each unit included in its system: a complete set group, an intermediate warehouse, a transport section, a washing and defect section, a tool section. The tasks of the operational management department and the information processing and analysis department, which are part of the control center of a centralized specialized production, are outlined.Discussion and conclusions. The results of the study are intended for the enterprises of passenger transport. This study is an integral part of the development of a common system of centralization and cooperation of maintenance of rolling stock.

ТЕХНОЛОГИЧЕСКАЯ ПОДГОТОВКА ПРОИЗВОДСТВА ПРИ ОСВОЕНИИ РЕМОНТА ЛОКОМОТИВОВ

The study objective is to show the importance of process engineering in traction rolling stock repair under the conditions of reforming the domestic locomotive repair complex in terms of the transition to service maintenance and repair. The paper is devoted to the description of production preparation to the repair of new types of traction rolling stock for planning, organizing and effectively managing the process engineering at a stated time. As part of the study, the theories of information and technical systems, the theory of queuing, optimization of technological processes and experiment planning, system analysis are applied. The novelty of the work is in identifying the main stages of process engineering, in making a business process model of the algorithm for forming a network plan for production design engineering (PDE), allowing to show any production process not only from the side of control and providing it with inventory resources, technical documentation, qualified employees, but also from the side of verifying the technology of performing operations. It is found out that in the conditions of reforming the domestic locomotive repair complex, the issue of performing PDE for the repair of traction rolling stock (TPS) is urgent. The main PDE stages are highlighted. The main purpose of process engineering is to develop an optimal technological process (TP) that would ensure the repair of products of a given quality with minimal costs. At the preparatory stage, the exact organization and production preparation itself is of key importance. These costs are constantly increasing with the continuous complication of the locomotive structures themselves and the need to reduce the time for repairs. PDE advantages and disadvantages in IPS Techcard system are noted.

The use of energy-saving technologies in the maintenance and repair of rolling stock

The use of energy-saving technologies in the maintenance and repair of rolling stock

SCIENTIFIC APPROACH TO THE METHODS OF INCREASING THE LIFE CYCLE OF WHEELS OF RAILWAY VEHICLES

The value of the life cycle of rolling stock wheels is determined by the frequency of maintenance, in the process of which the turning is carried out to restore the profiles of the rolling surfaces, or the replacement of completely worn wheels. Traffic safety depends on the technical condition of the wheels of locomotives and wagons. Maintenance and repair of wheelsets accounts for about 30% of all costs of Ukrzaliznytsia's rolling stock repair units. Wheel repair technologies are based on the complete restoration of wheel profiles by turning, using which, their life cycle is reduced, and costs increase by 20% or more. The railways of Ukraine use an outdated, unreasonable, inefficient system of control over the formation of rolling surfaces in operation. Therefore, there is a need to create a scientifically sound approach to methods of extending the life cycle of the wheels of locomotives and wagons while ensuring the safety of railway rolling stock. According to the proposed scientific approach, the wheel profile is restored to optimal parameters, which provides an extended life cycle of wheelsets. As a result of the developed scientific approach the life cycle of wheel pairs will increase by 15… 25% and the expenses of the railway for their repair will considerably decrease.

ENERGY SAVING BY REPLACING UNLOADED ENGINES OF NON-STANDARD EQUIPMENT FOR ROLLING STOCK REPAIR

It is established that at various technological processes at repair of a rolling stock of railways electric drives of the universal non-standard equipment can constantly work in essentially underloaded mode that leads to deterioration of their power indicators. The aim of the work is to quantify the reduction of active power losses when replacing constantly underloaded asynchronous motors of unregulated electric drives of universal non-standard technological equipment used in the repair of railway rolling stock with less powerful ones. In this work, the subject of research are the motors of electric drives of this equipment. The analysis of technological processes at repair of a rolling stock, technical characteristics of the specified equipment is carried out and the conclusion is accepted that first of all it is expedient to investigate efficiency of replacement on the equipment of the established engine on less powerful at carrying out at the specialized enterprises of such technological processes warehouse (wheel pairs, traction motors, auxiliary electric machines, frames of rolling stock carts, etc.). The load of the electric motors of transport trolleys of equipment is proposed to be defined as the ratio of the weight of a large unit of electric locomotive, diesel locomotive, electric train and other types of rolling stock to the carrying capacity of universal non-standard equipment of transport trolley. The term "universal" equipment is introduced in the work, which means equipment for performing a certain technological process in the repair of various large units of different types of rolling stock, as well as "specialized enterprise" specializing in the repair of rolling stock, large units which weigh significantly less, than the load-lifting capacity of the transport cart of the equipment. Therefore, the motors of electric drives of universal equipment at these enterprises are constantly operating underloaded. Also actions for quantitative assessment and reduction of active power losses in the electric drive motor are offered.

Reengineering of technological processes of rolling stock repair based on the use of simulation modelling with ARENA

The paper considers the use of simulation modeling in the reengineering of technological processes for repairing rolling stock units. The object of reengineering is the key sub-processes repair of units and parts a bogie model 18-578 of a gondola car. The purpose of the reengineering of the considered technological process is to increase its throughput. When choosing a reengineering option, the indicators of work in progress and the degree of utilization of resources used for repairs were taken into account. The assessment of these indicators was carried out on the basis of modeling in ARENA functioning of the formed variants of the technological process reengineering. The model of the current variant of the technological process of repair is a model of the «AS IS» type, and the models of the process reengineering variants act as the «AS TO BE» models. When simulating, the technological time of repair operations was taken equal to the standard values specified in the technical documentation for the organization and support of the repair technological process under consideration. The schedule and organization of the repair shift were also taken into account. The simulation results made it possible to formulate recommendations for choosing a reengineering option for the technological process under consideration.