In this article we describe the solution to make an estimate of allowed alternations in model components parameters that make up a data processing and control system. They reflect properties of physical and information components of the aforementioned system. This solution is derived according to the limitations of possible changes in integral property that describes the system behavior in different modes of operation. The proposed solution makes it possible to solve not only the direct problem -making a conclusion whether the vulnerability of the data processing system is negligible with respect to alternations in parameters of this systems components but the inverse as well, finding tolerable levels in alterations in systems components parameters from an acceptable level of uncertainty of targeted efficiency. The proposed solution follows known demands: inner properties of the system must be so that customer demands are fulfilled.

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In this paper, an approach to building a system is proposed, the basis of which target efficiency management is use of people's psychological characteristics, and not hardware redundancy. The special case is considered on the example of the telephone conversations registration, where, as a solution to the problem of loss efficiency, this is ensured by a time limit for conducting negotiations. The paper considers cases when the system has 16, 32 or 48 channels. An example is given under what conditions it is necessary to limit the duration of telephone conversations. The case of using a proactive approach as a prediction for estimating a range of requests is described, which will allow solving the problem of managing the flow of requests. The novelty of the proposed approach to improving the efficiency of systems, in contrast to the classical approaches, consists in taking into account the psychological characteristics of people interacting with the technical system. Keywords-target efficiency, hardware and software complex, system survivabilityI.

The approach to the study of the components hardware-software complexes (HSC) survivability on the efficiency index for the interval uncertainty of the state's structure components is described. The problem of estimating the impact of HSC efficiency indexes variability in different operation modes on the evaluation under of target efficiency survivability is formulated. The study's results for various structures of HSC states are shown.