The Review of the bachelor’s thesis of Ekaterina Lifantova, a student of Saint-Petersburg State University “Decision support system for diagnosis” The final qualifying work of Ekaterina Lifantova devoted to the development of medical expert system for decision support in the diagnosis of patients with diseases of the pancreas. In undergraduate work were invited to use the original data structure that can store as the exact symptoms of the disease, and possible symptoms that certain unconfirmed. Also the algorithm for the search of the diagnosis in case of incomplete data was proposed. Special attention was paid to limiting the many possible diseases that match the symptom set, by identifying the most probable disease. In the bachelor work appropriate probabilistic model of the diagnostic process were developed and implemented. I believe, Ekaterina Lifantova should be allowed to defend the bachelor's thesis, and the undergraduate work itself deserves the highest rating. Reviewer, Ph.D., Associate Professor V. Klemeshev of Department of Electromechanical and Computer Systems Modelling