Methods and systems for providing unanticipated demand predictions for maintenance
First Claim
1. A computer-based method for predicting a probability of failure for a component of a platform at a specified time, said method comprising:
- collecting, within a computer memory, historical maintenance data relating to the component;
selecting, utilizing the collected historical maintenance data, a lifetime distribution model that best fits the historical maintenance data;
estimating, with a computer, upcoming component failures using the selected lifetime distribution model; and
applying maintenance schedule dates for the platform to the upcoming component failures, with the computer, to determine a likelihood of failure of the component on one of the scheduled maintenance dates;
wherein selecting a lifetime distribution model that best fits the historical maintenance data comprises using at least one of a predetermined goodness of fit factor and a lack of fit test, to determine a fit of the collected historical maintenance data to each of the available lifetime distribution models; and
wherein using the at least one of the predetermined goodness of fit factor and the lack of fit test comprises evaluating a fit of the historical maintenance data with a lifetime distribution model using a test statistic that describes how closely resulting data emulates each available lifetime distribution model.
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Abstract
A method for predicting a probability of failure for a component of a platform at a specified time is described. The method includes collecting historical maintenance data relating to the component, selecting, utilizing the collected historical maintenance data, a lifetime distribution model that best fits the historical maintenance data, estimating upcoming component failures using the selected lifetime distribution model, and applying maintenance schedule dates for the platform to the upcoming component failures to determine a likelihood of failure of the component on one of the scheduled maintenance dates.
21 Citations
15 Claims
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1. A computer-based method for predicting a probability of failure for a component of a platform at a specified time, said method comprising:
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collecting, within a computer memory, historical maintenance data relating to the component; selecting, utilizing the collected historical maintenance data, a lifetime distribution model that best fits the historical maintenance data; estimating, with a computer, upcoming component failures using the selected lifetime distribution model; and applying maintenance schedule dates for the platform to the upcoming component failures, with the computer, to determine a likelihood of failure of the component on one of the scheduled maintenance dates;
wherein selecting a lifetime distribution model that best fits the historical maintenance data comprises using at least one of a predetermined goodness of fit factor and a lack of fit test, to determine a fit of the collected historical maintenance data to each of the available lifetime distribution models; and
wherein using the at least one of the predetermined goodness of fit factor and the lack of fit test comprises evaluating a fit of the historical maintenance data with a lifetime distribution model using a test statistic that describes how closely resulting data emulates each available lifetime distribution model. - View Dependent Claims (2, 3)
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4. A computer-based method for predicting a probability of failure for a component of a platform at a specified time, said method comprising:
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collecting, within a computer memory, historical maintenance data relating to the component; selecting, utilizing the collected historical maintenance data, a lifetime distribution model that best fits the historical maintenance data; estimating, with a computer, upcoming component failures using the selected lifetime distribution model; applying maintenance schedule dates for the platform to the upcoming component failures, with the computer, to determine a likelihood of failure of the component on one of the scheduled maintenance dates; comparing a distribution of residuals with a distribution of errors in the selected lifetime distribution model using a quartile plot; and interpreting abnormal deviations from the error distribution as a potential deficiency in the selection of a particular lifetime distribution model.
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5. A computer-based method for predicting a probability of failure for a component of a platform at a specified time, said method comprising:
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collecting, within a computer memory, historical maintenance data relating to the component; selecting, utilizing the collected historical maintenance data, a lifetime distribution model that best fits the historical maintenance data; estimating, with a computer, upcoming component failures using the selected lifetime distribution model; applying maintenance schedule dates for the platform to the upcoming component failures, with the computer, to determine a likelihood of failure of the component on one of the scheduled maintenance dates; creating a cumulative distribution function for the selected lifetime distribution model for the component to establish a compounding aggregation of failure throughout its lifetime; generating a hazard rate distribution, illustrating a rate at which the component fails, for the elected lifetime distribution model; wherein applying maintenance schedule dates for the platform to the upcoming component failures comprises; applying the scheduled maintenance dates to the lifetime distribution model by extracting and utilizing the cumulative distribution function and hazard rate distribution to evaluate the likelihood of component failure on the actual scheduled maintenance date; representing the likelihood of component failure as a failure propensity coefficient; and presenting the failure propensity coefficient to a maintenance scheduler.
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6. A system for predicting a probability of failure for a component of a platform at a specified time, said system including at least one computer programmed to cause a computer processor to:
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receive and store historical maintenance data relating to the component; select a lifetime distribution model that best fits the stored historical maintenance data; estimate an upcoming component failure using the selected lifetime distribution model; and apply maintenance schedule dates for the platform to the upcoming component failure estimate to determine a likelihood of failure of the component on one of the scheduled maintenance dates;
wherein to select a lifetime distribution model that best fits the stored historical maintenance data, said computer is programmed to use a predetermined goodness of fit factor to determine a fit of the stored historical maintenance data to each of the available lifetime distribution models; and
wherein said computer is programmed to evaluate a fit of the stored historical maintenance data with the lifetime distribution model using a test statistic that describes how closely resulting data emulates each available lifetime distribution model. - View Dependent Claims (7, 8, 9, 10)
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11. A system for predicting a probability of failure for a component of a platform at a specified time, said system including at least one computer programmed to cause a computer processor to:
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receive and store historical maintenance data relating to the component; select a lifetime distribution model that best fits the stored historical maintenance data; estimate an upcoming component failure using the selected lifetime distribution model; and apply maintenance schedule dates for the platform to the upcoming component failure estimate to determine a likelihood of failure of the component on one of the scheduled maintenance dates;
wherein said computer is programmed to;compare a distribution of residuals with a distribution of errors in the selected lifetime distribution model using a quartile plot; and interpret abnormal deviations from the error distribution as a potential deficiency in the selection of a particular lifetime distribution model.
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12. A computer-based maintenance and repair method associated with low volume and long lead time parts for a platform, said method comprising:
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utilizing a depot maintenance schedule within a computer memory to identify scheduled visits of a platform to a depot level maintenance area; retrieving, at a computer associated with the computer memory, maintenance data relating to low volume and long lead time parts associated with the platform; mining the retrieved maintenance data, with the computer, to determine a lifetime distribution model that best fits historical part failures; applying, using the computer, a dynamic model to each part lifetime to produce a failure propensity coefficient for each part with respect to each scheduled depot level maintenance area visit; and building an estimated demand plan for upcoming part failures, based on the failure propensity coefficients and the scheduled depot level maintenance area visits. - View Dependent Claims (13, 14, 15)
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Specification