Components validity evaluation in a complex technical structure

The described in literature components validity measures (the order of the smallest cross section measurement of streams, number of occurrences of events in the Fault Tree, Birnbaum, Veseley-Fussell’s measures, the potential of reliability improvement, Lambert’s measure ...) relating mainly to the concepts of reliability and reliability structures is characterized. Concepts of studying functional structures of complex technical systems are presented. Directions and the amount of streams of energy factors flow in the systems will be analyzed. The analysis will be performed for the so-called dynamic functional structures. The validity and importance of the component in the system is assessed on the basis of the number of streams of energy factors which flow to and from the component. The greater the number of those streams, the more responsible for the operation of the system in this state is the component.