System approach to assessing of the quantitative and qualitative characteristics of information

The approach to a systemically consistent analysis of quantitative and qualitative characteristics of information and assessment from the position of decision makers of their impact on the validity, reliability and effectiveness of solving systemic problems is proposed. From the position of the decision maker the basic definitions of the qualitative characteristics of the informedness of the decision maker, such as completeness, reliability and timeliness are formulated. When considering from a position of a system analysis problems the qualitative properties of informedness of the qualitative characteristics of the informedness of the decision maker are given. A proposed integral indicator of informedness is takes into account the degree and level of influence of each of the introduced qualitative indicators on the degree of achievement of the goals of the decision-maker. In the formation of an integrated indicator of the decision-maker's knowledge, certain properties and features of qualitative indicators are introduced in terms of completeness, reliability and timeliness. Informedness level is introduced: it is a measure of the possibility of analyzing many situations. A measure of opportunity is used in the interpretation of the theory of opportunity. There are contradictions between the level of completeness and reliability of informedness, on the one hand, and the level of timeliness, on the other. Therefore, the important task is the search of a rational compromise between the levels of completeness, reliability and timeliness in the process of forming a solution, while taking into account the requirements for reducing the time to do it. Based on the above approach, the operation of the power supply unit of a computing system is investigated taking into account four situations and a seven of risk factors that bring the system into an emergency mode. The allowable time interval is calculated during which the computer system will work in the normal mode, while taking into account the completeness, reliability and timeliness, will work in the normal mode. This problem is solved in human-machine interaction mode.