Improving the Efficiency of the Production and Technical Base of Service Enterprises
Authors:   Dnipro State University of Agriculture and Economics, Subochev Olexander , Bіliy Denis ,   Dnipro State University of Agriculture and Economics, Sichko Olexander ,   National Transport University
Published: April 2021

The formation of a fractional factorial experiment for construction using the method of regression analysis of the linear dependence of the target functional on the variables is proposed. The tasks of optimizing queuing systems with discrete variables and mixed tasks with discrete and continuous variables (which, in particular, includes the system of maintenance and repair of machines) are the most difficult. An experimental matrix is constructed, which consists in modeling the technological process of service enterprises, determining the variables in all values of the objective functional. The matrix of the experiment contains a significant number of lines, necessitates the use of regression analysis in full amount to construct a linear regression equation. The inversion of the coefficients matrix of the equations normal system is solved using the numerical Gaussian method, which also gives the value of the determinant. It is proposed to study the influence of the level of mechanization on the performance of maintenance and repair, it is necessary to determine the degree of influence of mechanization on the complexity of repair work. The degree and level of technological processes mechanization of maintenance and repair for each type of car and in general for the existing cargo service enterprise is calculated. The processing extensive evidence effect using correlation-regression analysis is obtained. Evaluation models by Fisher's criterion showed that the greatest approximation is obtained by approximating the available data by the regression equation. It is established that the effective technological equipment of current repair posts involves the introduction of mechanization, automation and robotics of production. In this regard, in relation to the standard equipment of current repair stations special attention and implementation in production practice deserve mechanized technological complexes at specialized posts for replacement and current repair of engines, units and units of the chassis of the ditch type and lifts. The dependences of the criterion indicators of profit from the production of maintenance and repair of cars and the cars stay time in defective condition from the studied factors are determined. The principal distinguishing feature of the obtained dependences is that each of the dependences describing the influence of a single factor on the criterion of efficiency is obtained under the combined influence of the other five factors. The optimal values of the studied factors are obtained, both for the maximum profit from the production of maintenance and repair of cars and for the minimum time of the cars in a faulty condition. Analyzing the approximate dependences of the influence of factors on the parameters of the efficiency of maintenance and repair of cars, it follows that the efficiency parameters do not improve over the entire range of the factor, but to a certain value.