The main objective of this paper is the achievement of research based on theoretical studies and experimental data processing in engineering and management solutions for the modernization of Air Defense Integrated systems. This paper proposes a study of the resource extension, recovery, and modernization processes of aerial vectors, including the integration of missile systems with short range of action in a flexible structure. Critical analysis of the performance requirements using the methods Analytic Hierarchy Process (AHP), a multi-criteria method in decision- making, value engineering, created the framework for evaluating the existing air defence systems and the choice in the case of purchase of new systems. Also the AHP a very flexible and powerful tool was used in order to emphases the manner in which the Electronic Counter Neasures (ECM) capability may affect the single shoot kill probability.