The system approach to the study of organizational and technical systems, including organizational and technical elements and the interaction between them is used. The analysis of the literature on the investigated problem is carried out, the choice in favor of the conflict theory for the study of organizational-technical systems is made and the necessity of solving the scientific problem of clarifying the applicability of existing assessments of the conflicts of the system is determined. The hypothesis of the existence of a relationship between estimates of the conflict relations of elements and performance indicators of organizational-technical systems is considered.By the example of a special purpose local communication network a mathematical model of conflict interactions is developed, utility functions of its elements are introduced, existing and new methods of evaluation of conflict relations of elements and the system as a whole are considered.On the model of the considered local network we conduct a full-scale experiment to define the network performance (the ratio of the data transmission rate to the channel capacity, the central processor load, the ratio of the transmission time of a fixed amount of data to the minimum achievable with the use of the entire channel capacity) in various conditions of its operation, including the impact of negative factors. For each investigated state of the local network, we modify the mathematical model to calculate the values of the conflict relations of the elements and the system as a whole.The choice of estimates of the conflict relations, potentially having connection with efficiency indicators is carried out. The correlation between the selected set of assessments of conflict relations and performance indicators is determined by methods of correlation analysis. As a result of the analysis, we singled out the estimates, which can be used to predict the degree of change in the conflicts of the system and its elements when modifying or changing the conditions of functioning.