CYBERNETICS, LAW OF REQUISITE VARIETY, AND DEVELOPMENT OF ECONOMIC INDICATOR FORECASTS
The article comprises two sections. The first section gives a review of some problems of the Law of Requisite Variety (LRV), a fundamental law of cybernetics which English scientist W. R Ashby formulated: notions of requisite, variety, and requisite variety are explained; instances of wide-variety systems are given; special LRV definitions and some known interpretations are presented; LRV practical importance is outlined; how LRV is reflected in Russian proverbs and sayings as well as in routine life. In the second section, an extended interpretation of the Law of Requisite Variety is given with respect to time series forecasting of the economic indicators. An admissible individual statistical model of economic indicator is introduced; causes of multiplicity of such models are examined; advisability of multipurpose use of the models and other relevant data, which are applied for time series forecasting calculations related to the economic indicators system, is validated.