Reengineering is an important anti-crisis management tool because it is aimed at restructuring (redesigning, updating) business processes in order to achieve a radical, leaps and bounds improvement of the enterprise’s activities. In light of the current unstable economic situation in the world, management cannot have any other basis than the search for and active use of new forms, methods, techniques, business areas, since the previous approaches no longer justify themselves. Therefore, reengineering has become one of the most effective innovations in management consulting in recent years. The statement of the problem is carried out, the main purpose and tasks of the research are determined. This study analyzes the scientific work of various economists and scientific schools on the approach to radical redesign of business processes (business reengineering). The concept of business process and features of its identification are formed. The stages of reengineering business processes of companies are studied. Focus zones have been formed in the work of enterprises that can be positively affected by business process reengineering. The main conditions for reengineering the company's business processes are determined. The main procedural aspects of business process reengineering and the main work within each procedure with its subsequent visualization are noted. The main structural elements of changes in business processes during their reengineering of the company are determined. The main conclusions of the research are formed. The main scientific approaches to the process of change in the work of companies are noted, focusing on customer-oriented management of business processes in their reengineering in the work of enterprises. The analysis of the implemented solutions of business process reengineering and possibilities of its further realization in the companies at the international level is carried out. Theoretical provisions of business process reengineering through the basic principles of its implementation are studied. The main focus areas of changes in the work of companies, which introduced the reengineering of business processes with a description of the peculiarities of the process of change in these focus areas of companies. The general conclusion on the given scientific research is formed.