The Use of a Fault Tree Analysis (FTA) in the Operator Reliability Assessment of the Critical Infrastructure on the Example of Water Supply System

Background: Specialist literature indicates a large share of the human factor among causes failure technical systems at level 70 to 90%, which depends on sector studied. The collective water supply system is an anthropotechnical system, i.e., it complex connection between man and resulting from deliberate influence system. Methods: work presents assessment operator reliability selected treatment process based fault tree analysis (FTA). Elementary events are determined by operator’s error probability. Results: A was prepared for peak event filter station failure, during washing procedure. probability occurring 0.0580. Conclusions: developed allows identification elementary leading emergency event. fulfills its task maintaining continuity treatment.