“…Moreover, the same, essentially erroneous actions of the operator (for example, untimely pressing of a button) can lead to errors of five different types, manifested in the malfunction of the equipment, damage to information, disorganization of the staff, incorrect or irregular functioning of the entire system. The noted circumstance requires that when developing a performance model, it is not the process of operational failures occurrence that should be guided, but the consequences of errors should be considered in the models of hardware, information and functional performance [7].The distribution of staff errors by type can be carried out when analyzing the activities of specific specialists. The available data only approximate this distribution.…”