Inventors:
Theodore A. Meyer - Harrison City PA, US
Robert K. Perdue - Murrysville PA, US
Warren H. Bamford - Pittsburgh PA, US
Edward Terek - Irwin PA, US
G. Gary Elder - Monroeville PA, US
Joel Woodcock - Herminie PA, US
Assignee:
Westinghouse Electric Company LLC - Monroeville PA
International Classification:
G06Q 10/00
Abstract:
An improved method of selecting and planning the performance of various maintenance activities on a facility such as a nuclear power plant includes determining the net present value of a number of future net savings that are expected to result from performance of the maintenance activity at a given time, and selecting and planning the maintenance activities in a fashion that maximizes net present value. The method includes, for each of a number of components and a number of time periods, determining a change in the probability that a component will fail within a time period, with the change resulting from an assumption that a maintenance activity is performed. The change in probability is multiplied with the losses associated with a failure in order to determine a gross savings from which costs are subtracted to determine net savings. The probabilities of failure may be determined from a probability failure model that has been derived from multiple sets of failure data that are characterized by Weibull distributions and are mathematically combined according to Bayes' Theorem. The maintenance activities may also be optimized according to a number of budget figures.