The problems of unclearness of information are considered in the processes of management. The analysis of the use of the unclear set theory is conducted in the processes of decision-making. The methods of construction of function of belonging of fuzzy sets and variables are considered. The example of decision of task of unclear management is resulted by a linguistic variable.
automated control system, linguistic variable, unclear management, fuzzy set, unclear variable, object, decision-making, difficult system, phasic, function of belonging