This paper presents an efficient method, called xTAN for extended Tensorial Analysis of Networks. This method is based on the Krons method and game theory. This method can be used to model the behavior of complex electronic systems from an electromagnetic compatibility point of view. In this article, we have developed the xTAN method for a cyber-physical system (CPS) under electromagnetic environment and finally we present some future applications for system-of-systems (SoS) approach using xTAN method.