Abstract: A method monitors a plurality of elevators, in which at least two elevators are set into shuttle mode in which the corresponding elevator travels between two pre-defined floors. The method calculates at least one of an arrival time and a departure time of an elevator car of each of the at least two elevators in shuttle mode at a predetermined floor; determines a time required by a user for reaching each of the at least two elevators in shuttle mode from an operation terminal location; and calculates a preference order of the at least two elevators in shuttle mode on the basis of the time of arrival and/or departure of the elevator car of each of the at least two elevators in shuttle mode and the time required by the user for reaching each of the at least two elevators in the shuttle mode from the operation terminal location.