International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Since 1960, an economic policy of specialization in machine-building production began in Bulgaria, thanks to which a number of new types of production were developed in our country, which subsequently acquired a key importance for the further development of the industry. As a result of the implementation of this policy for twenty years, qualitative changes have occurred in the Bulgarian economy: intensification of production, orientation towards productions providing higher added value, inclusion in the international division of labor, constant growth of social productivity, raising the general technological level of industry, multiple increase in the class of technical intelligence, etc. Thanks to the implemented policy of specialization in machine-building production, Bulgaria overcomes the general economic backwardness of other countries.

Were selected queuing systems with different load, queue length and type of mutual assistance for the calculation of technical and economic indicators of technical service enterprises. The models of functioning A, B, C are given, which mainly reflect the properties of the internal environment of technical service enterprises. For the form of labor organization (model B), partial mutual assistance between the performers is provided, a mathematical model with a limited queue length is adopted. Optimization of the capacity of technical service enterprises is expressed in determining the number of service posts. The dependence of the level of competitiveness of technical service enterprises of the average and maximum possible queue length, the expected cars is obtained. When observing the structure of technical service in Dnipro, changes in the number of technical service enterprises were obtained by type of work performed, depending on the years of work. It has been substantiated that the criterion for choosing the type of specialization, location and capacity of service enterprises is the payback period of capital investments. It was optimized selection of a service company for forecasted demand, accommodation and specialization in a competitive environment.