Aim. To develop and formulate an algorithm that allows timely diagnosing and eliminating problems in business processes.Objectives. To consider and systematize the main signs of problems in business processes; to determine the main sources, causes of losses and inefficiency; to formulate an algorithm that allows to assess the effectiveness of the process; to test the proposed algorithm for assessing the effectiveness of business processes on the example of a specific organization.Methods. The authors used the methods of descriptive literature review and statistical data analysis. The research includes the study and analysis of scientific articles, reports of scientific conferences and other publications related to the subject of the article. The analysis of statistical data is based on the performance of the organization, in particular the operator of urban mobility services. All data used for calculations are of a conditional nature.Results. In the process of research the works of modern authors related to the analysis of efficiency and diagnostics of problems in business processes are considered and generalized. In the mentioned works some theoretical aspects of the topic are widely and in detail studied, which are then systematized by the authors of the present study. As a result, an algorithm has been formed that allows in practice to monitor the efficiency of business processes of the organization, as well as to diagnose possible problems in a timely manner. When testing this approach in practice, in the context of the analysis of business processes in the organization, the following results were obtained: a number of critical problems in business processes that have a negative impact on the result of activity were identified; a plan to improve their efficiency was developed and implemented.Conclusions. The process approach is one of the most successful tools to improve the efficiency of the organization. Optimal operation of all key and essential business processes ultimately affects the company’s result. The operating conditions of an organization are constantly changing under the influence of a dynamic business environment. One of the most important elements of the efficiency management system for business processes, and consequently for the business as a whole, is a properly formed set of indicative indicators reflecting the progress of each process. The choice of indicators should be based primarily on the strategic goals of the organization, cascaded down to the level of individual processes. The study confirmed the hypothesis that the risks of efficiency reduction can be identified in advance and in a timely manner with the help of a correctly constructed system of simple control indicators. For these purposes, taking into account the concept of lean production and continuous improvement, as well as on the basis of the classification of losses set out in it, a questionnaire for express analysis of business process efficiency has been developed.