ABSTRACT
During the combat the chief of medical service has to solve both the direct mission, i.e. to choose the most effective variant of organization of treatment-and-evacuation measures (TEM) and the indirect one, i.e. to define the needs of medical service in forces and resources according to the given model. To fulfill these missions the most effective method is the multi-criteria approach for practical realization of which the "successive steps" method was chosen. The main indicator of TEM effectiveness is the time from the wounding to the point of readiness for evacuation from the regimental aid station. The GPSS language of different dialects as the modelling environment is preferred on the basis of which two computerized imitative models were created: the model of TEM effectiveness in the company-battalion link and the model of regimental aid station work.