ANALYSIS OF MAINTENANCE EXPENSES IN TELEPHONE EXCHANGES AS THE BASE OF MICROCOMPUTER CONTROLLED MAINTENANCE/ ANALYSE DES INSTANDHALTUNGSAUFWANDS IN VERMITTLUNGSSTELLEN ALS GRUNDLAGE FUER EINE MIKRORECHNERGESTUETZTE INSTANDAHALTUNG.

AN ANALYSIS OF THE MAINTENANCE EXPENSES IN AN AUTOMATIC TELEPHONE EXCHANGE SHOWS THAT A SUBSTANTIAL PORTION OF SUCH EXPENSES IS ASSOCIATED WITH THE DETECTION OF FAILURES. THERE EXISTS, AT THE SAME TIME, A DEPENDENCE OF THE AVERAGE DURATIONOF FAILURE ON THE CONTROL PERIODS AND THUS ON THE INHERENT MAINTENANCE FACILITIES. IT IS SHOWN HOW MAINTENANCE CAN BE OPTIMIZED BY THE USE OF MICROCOMPUTERS FOR FAILURE DETECTION.