The concept of Impression Evaluation Method extends impression management instrumentality by a direct and proactive method which deals with stakeholders’ impression causes: organization’s activities, products or services. The objective of the study is to formulate assumptions about the structure of the transfer mechanism between impression input and output, with a secondary interest in obtaining knowledge on impression internal workings. The suggested system approach has been developed from a set of theories originating from decision theory, total quality management, mathematical psychology and other areas. The proposed concept is based on an impression conceptual definition and conceptual model of impression formation process provided in the first publication on results of this research [1]. Impression Evaluation Method is anticipated to be used at all stages of design and implementation of product, service or activity, beginning with the earliest stage, in order to improve the decision making process. Stakeholders’ impression evaluation and management is one of the prospective trends of sustainable development. The concept provides guidelines for impression’s evaluation algorithm sufficient to develop a mathematical apparatus of impression evaluation method and for further research. A discussion of the mathematical apparatus development will be published in the following paper.