The main problem of modern human resource management is the automation and optimization of the work of the administrative and managerial division employees and workers, whose professional activities are within the framework of project activities but not controlled by the conveyor process. The relevance of this topic arose in the last quarter of the 20th century and is increasingly increasing at present. Automation involves the use of equipment, software and methodologies, which allow automating business processes, reducing “manual labour”, and minimizing the risks of the human factor. Business processes optimization involves the search for efficiency in methodological transformations of working conditions, i.e., simplification and acceleration of processes while maintaining the quality level. The study purpose is to develop the ABC methodology, which involves the use of triplicity in positioning the calculation of indicators of various system parameters. In the study course, analytical, logical, comparative research methods and modelling methods were used. Materials and works of leading and modern researchers in the field of labour management and automation were used to implement the study. The author concludes that the ABC methodology has several objective advantages both in its model and the mathematical component, which makes it possible to borrow and adapt the methodology for any enterprise where business processes can be applied.