Development of a scientific and methodological apparatus for ensuring the functional reliability of special-purpose information systems

The object of research is special-purpose information systems (IS). The problem addressed in the study is the improvement of the functional reliability of special-purpose IS. The development of a scientific and methodological apparatus for providing a functional special-purpose IS was carried out. The originality of the research consists of: – systematic assessment of the state of functional reliability of special-purpose IS using the proposed principles of its provision; – construction of multidimensional dependencies of the state of functional reliability of the special-purpose IS, which achieves an assessment of the functional reliability of the IS based on an arbitrary number of indicators; – in the assessment of the functional reliability of special-purpose IS using the joint use of measurement data and fuzzy expert assessments, which solves the problem of dimensionality; – in the construction of the time dependence of changes in indicators that characterize the state of functional reliability of special-purpose IS, which allows determining the moments of deviation of their values from the nominal ones. In the assessment of the functional reliability of information services based on the concept of profiles, which achieves the possibility of decentralized influence on the special-purpose IS to increase its functional reliability. In reducing uncertainty about the state of functional reliability of special-purpose IS, due to the use of an appropriate approach in the method of assessing the functional reliability of information services based on the concept of profiles. The proposed scientific and methodological apparatus provides an increase in the efficiency of assessing the functional reliability of the IS by an average of 40%, while ensuring high reliability of the obtained results at the level of 92%, which is confirmed by the results of a numerical experiment.