Stochastic Factor Analysis of Occupational Injuries at Railway Transport Enterprises

Introduction. Railway enterprises are characterized by an increased labor risk, the professional activity of personnel is associated with the risk of injury. Occupational safety measures are regularly carried out in the industry. At the same time, accidents are known to occur in Russian Railways JSC (Russian Railways). Risk reduction requires a theoretical study of the problem, as well as the study of applied solutions, which determines the relevance and significance of the proposed study. The purpose of the work is to determine the resulting indicators on which the dynamics of industrial injuries in Russian Railways depends.Materials and Methods. To identify the causes of injury to railway transport workers of the Russian Railways holding, the authors analyzed statistics for 2007–2021. We systematized and ranked 17 types of accidents, which are associated with accidents resulting in injuries. Using the Pareto chart, they were differentiated as resultant and non-resultant. We identified 7 resultants. We performed a stochastic analysis and established the relationship of each factor with the total number of accidents. The correlation coefficients were calculated.Results. Preliminary calculations were presented in the form of a table to obtain the coefficient of stochastic dependence of industrial injuries on the number of injured employees of Russian Railways in road accidents. The value of the stochastic relations coefficient was calculated and adjusted. The average error was determined — the difference between the general injury rate and the injuries in road accidents. The results of these calculations were compared with the data of the Student's t-distribution quantile table for confidence probability. Similarly, the degree of stochastic relationships for the other resulting types of incidents was calculated and summarized in a table. The result was visualized in a diagram.Discussion and Conclusion. The results of the conducted surveys allow us to assert that the dynamics of industrial injuries in Russian Railways JSC is determined mainly by incidents in road accidents. It is necessary to investigate their causes and develop measures aimed at improving occupational safety.