Abstract :
The performance of any kind of system defines not only its serviceability, but also its effectiveness plays in the modern society very important role. The consumer society we live in demands still better and better services, though the Earth´s resources are limited and the infrastructure upgrade cannot be done to infinity. Therefore, an optimization of particular systems´ and services´ performance upon the set-up kept belongs to the core activities of many researchers, public authorities as well as companies all over the world. Aside from huge projects of the really big world enterprises, the solutions brought along the research comprise the necessary basement for further extensions applied in real scenarios.