Striving to popularize and make use of the industrial Engineering techniques is a major means for enhancing industrial enterprise productivity and improving economic officiency. This paper focuses on the "PPP" concept and its models which are now widely used in many countries for the measurement and analysis of productivity. Its purpose is to find out a productivity analysis method specially suitable for the conditions in this country.The Profit Margin (PM) model and Return On investment (ROI) model are discussed and improved. The improved models can be used for diagnosis and assessment of the results which are obtained by employing various kinds of iE techniques in industrial enterprises.