Modelling elements of a technological system to improve its safety

The analysis of a person’s activities to ensure their safety and that of others involves modelling their work process. Developed a hazard formation scheme. Developed causes of erroneous and dangerous human actions and obtained an indicator of accuracy of human actions. Formalised the process of equipment diagnostics. The infl uence of the environment on a person has been investigated and the index of discomfort of working conditions has been obtained. Formulated mathematical formulation of the task of optimum organisation of work. The approaches presented in the article lay the foundation for the development of safety assurance theory.