For the time being concerned the research with the assessment of the recent using the indicators in the EMS, the experiences of the canton of Basel were at the forefront. It was noted that the previous status assessment using empirical characteristic quantities (technical and physical parameters, environmental conditions, statistical values) for the majority of EM equipment is a correct and proper assessment  tool. However, it is for each EM system a system-specific set of characteristic values gained in close cooperation with supplier and operational staff, universal characteristic values do not exist. Through continuous acquisition of characteristic quantities and their graphical representation and working up an empirical condition assessment of high significance is possible.