SUMMARY
The article describes a methodical approach to the solution of actual problem of substantiation of composition and structure of multifunctional organizational-technical systems military purposes on the basis of a formalized description of a problem situation and private decision-making problems. As an indicator of the effectiveness of system-level communication in General, it is proposed to select the generalized indicator reflecting the degree of achievement of objective justification at the level of functional subsystems of the communication system, as an indicator characterizing the level of solving the problem of a certain class. Among the advantages of the presented methodological approach are: creating the conditions for formalization of process studies the composition and structure of the system of any scale, comprehensive, multidimensional description of the system, the possibility of analysis in future interim results of assessment of efficiency justifications in the automatic mode and detection of the patterns, positive trends and areas for improvement systems to increase the efficiency of their use.