Patent ID: 6928391
Filing Date: 2005-08-09
Classification: G06Q

Abstract:
1. An apparatus for maintaining plant equipment comprising: an input unit configured to receive data on inspection, diagnosis, repair and operation histories for an equipment that constitute a plant; a failure-event tree breakdown unit configured to perform failure-event tree breakdown on failures to be expected for component parts of the equipment, in order to obtain a failure-event tree; a probabilistic life assessment unit configured to predict unreliability of a starting event in the failure-event tree; a failure-unreliability function calculation unit configured to calculate unreliability between items in the failure-event tree; a failure-derived monetary loss calculation unit configured to multiply each unreliability and a cost of recovery from each failure-event in the failure-event tree and accumulate results of the multiplication in accordance with the failure-event tree breakdown, thus obtaining a recovery cost; a preventive-maintenance expense calculation unit configured to calculate preventive maintenance expenses for preventing failure events; and a maintenance decision-making unit configured to decide maintenance timing and technique through comparison between the recovery cost and the preventive maintenance expenses.