Hryhorieva Y. Improvement of the risk-based approach to assessing working conditions through the introduction of an integral index

The dissertation is devoted to the solution of an urgent scientific problem, which is to improve the risk-oriented approach to the assessment of working conditions on the basis of the introduction of an integral index. The introduction of an integral index of harm, which will allow to take into account the mutual influence, to estimate the values of potential industrial risk at any number of harmful and hazardous factors in the workplace, is proposed. As a result of the analysis of methods of calculation of harmful factors of industrial environment and labour process the necessity of their application on the basis of risk-oriented approach was determined. A new approach to the topographical method of the analysis of working conditions has been developed by means of determining the regularities of the industrial risk level reduction at a distance from the workplace, taking into account the joint action of harmful and hazardous industrial factors from various workplaces. As a result of the conducted quantitative assessment of the potential harmfulness of the industrial processes on the basis of the assessment data of the factors of the industrial environment using the developed model of the integral risk determination, the assessment of the degree of the real professional and industrial risk of the impact on the health of the employees, whose working places are located in the building of crane shop of AF-1, was performed. The use of the proposed criterion for determining the integral risk, which allows to assess working conditions at workplaces and more objectively determine the class of working conditions, was substantiated. It has been experimentally proved that the impact of professional and heterogeneous industrial factors on a worker’s health in quantitative form can be objectively assessed on the basis of Weber-Fechner law through calculation of an integral index – potential risk. Verification of reliability of the developed model of an assessment of working conditions at any work places, made on the example of the repair shop and the crane economy has proved that a reliable assessment of working conditions can be carried out through the integral risk index, and the developed model can be used for an objective establishment of a class of working conditions. The established regularities have been experimentally confirmed, which allow to determine the zones of transformation of occupational risk due to mutual influence into an occupational risk and substantiate the measures of traumatism and occupational diseases reduction. A methodological basis for solving the issue of turning «doze – effect» through the erection of individual indexes to a single criterion of quality of the system as a whole by introducing probabilistic assessments of the level of hazard of the working environment by determining the level of hazard in the work zone using the function of integral risk is proposed. An algorithm of determining the class of working conditions based on the assessment of occupational risk and the probability of exposure of workers to all harmful and hazardous factors has been developed. Implementation of the obtained results and conclusions in the development of risk-oriented approach methodology in the certification of workplaces.