The article discusses the problems of forecasting technical and consumer characteristics at designing or modernization of complex technical systems. The model of the technique of complex technical system potential monitoring is proposed, it consists of two successive stages: analysis of technical level of the researched object relatively to its competitor and forecasting changes of consumer characteristics of the leading analogue for studied object using the moving average method. The methodology algorithm for monitoring of potential of a complex technical systems has been developed. The features of the developed methodology connected with obtaining of analytical data basing on which the enterprise becomes able to control the trends of complex technical systems modernization are indicated. Also the renewal of knowledge information bank will promote development of flexibility of small-scale production technological processes and adaptation to the factors of external competitive environment, adjusting itself to the needs of the current customer without extra human and financial resources.