DATA ANALYSIS APPARATUS AND METHOD
First Claim
1. A data analysis apparatus for evaluating a maintenance strategy for a plurality of devices, comprising:
- a database configured to store first case examples of the devices, each includinginspection time information which indicates an inspection for which of a plurality of periodic inspection times has been performed,a degradation level of the device,operation characteristics of the device, andreplacement information indicating whether the device should be replaced or not;
a maintenance strategy storage configured to store a evaluation maintenance strategy includingan evaluative inspection time which indicates a time at which a periodic inspection should be conducted instead of the plurality of periodic inspection times,an evaluation time indicating a time at which degradation of the devices is to be evaluated and which is later than the evaluative inspection time, in a case that the periodic inspection is conducted at the evaluative inspection time instead of the plurality of periodic inspection times, anda replacement condition indicating a condition for replacing the device based on the degradation level of the device;
a degradation prediction model storage configured to store a degradation prediction model for predicting the degradation level of the device from the operation characteristics of the device;
a base case example selector configured to select base case examples which are first case examples whose periodic inspection time precedes the evaluation time and having the replacement information indicating that the replacement should be conducted;
a case example generation and selection unit configured toestimate by using the database an estimated number of devices that have already been replaced before the evaluation time to not exist in the database, obtain the degradation level at the evaluative inspection time of each of as many devices as the estimated number by using at least the former of the base case examples and the degradation prediction model, and generate first virtual case examples including the degradation level at the evaluation time of devices whose obtained degradation level at the evaluative inspection time does not meet the replacement condition based on the base case examples and the degradation prediction model,calculate the degradation level at the evaluative inspection time of devices whose first case example have same periodic inspection time as the evaluation time from the first case examples of those devices and the degradation prediction model, and select first case examples of devices whose degradation level at the evaluative inspection time does not meet the replacement condition; and
an evaluator configured to evaluate the evaluation maintenance strategy by using generated first virtual case examples and selected first case examples.
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Abstract
There is provided with a data analysis method, including: providing a database storing for each of devices an example that includes inspection time, the degradation level, operation characteristics, and replacement information; providing a evaluation maintenance strategy including an evaluative inspection time, an evaluation time and evaluative replacement condition; providing a prediction model for predicting the degradation level of a device from operation characteristics thereof; estimating by using the database an estimated number of devices that have already been replaced before the evaluation time, evaluating the degradation level at the evaluative inspection time of each of as many devices as estimated number and devices subjected to inspection of same periodic inspection time as the evaluation time; and evaluating the degradation level at the evaluation time of devices whose degradation level at the evaluation inspection time does not satisfy the replacement condition.
20 Citations
13 Claims
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1. A data analysis apparatus for evaluating a maintenance strategy for a plurality of devices, comprising:
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a database configured to store first case examples of the devices, each including inspection time information which indicates an inspection for which of a plurality of periodic inspection times has been performed, a degradation level of the device, operation characteristics of the device, and replacement information indicating whether the device should be replaced or not; a maintenance strategy storage configured to store a evaluation maintenance strategy including an evaluative inspection time which indicates a time at which a periodic inspection should be conducted instead of the plurality of periodic inspection times, an evaluation time indicating a time at which degradation of the devices is to be evaluated and which is later than the evaluative inspection time, in a case that the periodic inspection is conducted at the evaluative inspection time instead of the plurality of periodic inspection times, and a replacement condition indicating a condition for replacing the device based on the degradation level of the device; a degradation prediction model storage configured to store a degradation prediction model for predicting the degradation level of the device from the operation characteristics of the device; a base case example selector configured to select base case examples which are first case examples whose periodic inspection time precedes the evaluation time and having the replacement information indicating that the replacement should be conducted; a case example generation and selection unit configured to estimate by using the database an estimated number of devices that have already been replaced before the evaluation time to not exist in the database, obtain the degradation level at the evaluative inspection time of each of as many devices as the estimated number by using at least the former of the base case examples and the degradation prediction model, and generate first virtual case examples including the degradation level at the evaluation time of devices whose obtained degradation level at the evaluative inspection time does not meet the replacement condition based on the base case examples and the degradation prediction model, calculate the degradation level at the evaluative inspection time of devices whose first case example have same periodic inspection time as the evaluation time from the first case examples of those devices and the degradation prediction model, and select first case examples of devices whose degradation level at the evaluative inspection time does not meet the replacement condition; and an evaluator configured to evaluate the evaluation maintenance strategy by using generated first virtual case examples and selected first case examples. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A data analysis apparatus for evaluating a maintenance strategy for a plurality of devices, comprising:
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a database configured to store one or more second case examples of each of the devices, each including inspection time information which indicates an inspection for which of a plurality of periodic inspection times has been performed, the degradation level of the device, operation characteristics of the device, and replacement information indicating whether the device should be replaced or not; a maintenance strategy storage configured to store a evaluation maintenance strategy including an evaluative inspection time which indicates a time at which a periodic inspection should be conducted instead of the plurality of periodic inspection times, an evaluation time indicating a time at which degradation of the devices is to be evaluated and which is later than the evaluative inspection time, in a case that the periodic inspection is conducted at the evaluative inspection time instead of the plurality of periodic inspection times, and a replacement condition indicating a condition for replacing the device based on the degradation level of the device; a degradation prediction model storage configured to store a degradation prediction model for predicting the degradation level of the device from the operation characteristics of the device; a case example generation and selection unit configured to obtain the degradation level at the evaluative inspection time for each device whose second case example has a periodic inspection time which precedes the evaluation time and having replacement information indicating that the replacement should be conducted, by using at least the former of the second case example of each device and the degradation prediction model, and generate second virtual case examples each including the degradation level at the evaluation time for the device whose obtained degradation level at the evaluative inspection time does not meet the replacement condition based on the second case example of the device and the degradation prediction model, calculate the degradation level at the evaluative inspection time for each device that have same periodic inspection time as the evaluation time by using at least former of the second case example of the devices and the degradation prediction model, and select the second case example having same periodic inspection time as the evaluation time from among second case examples of each device whose calculated degradation level at the evaluative inspection time does not meet the replacement condition; and an evaluator configured to evaluate the evaluation maintenance strategy by using generated second virtual case examples and selected second case examples. - View Dependent Claims (10, 11)
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12. A data analysis method, comprising:
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providing a database configured to store for each of a plurality of devices a first case example that includes inspection time information which indicates an inspection for which of a plurality of periodic inspection times has been performed, a degradation level of the device, operation characteristics of the device, and replacement information indicating whether the device should be replaced or not; providing a evaluation maintenance strategy including an evaluative inspection time which indicates a time at which a periodic inspection should be conducted instead of the plurality of periodic inspection times, an evaluation time indicating a time at which degradation of the devices is to be evaluated and which is later than the evaluative inspection time, in a case that the periodic inspection is conducted at the evaluative inspection time instead of the plurality of periodic inspection times, and a replacement condition indicating a condition for replacing the device based on the degradation level of the device; providing a degradation prediction model for predicting the degradation level of the device from the operation characteristics of the device; selecting base case examples which are first case examples whose periodic inspection time precedes the evaluation time and having the replacement information indicating that the replacement should be conducted; estimating by using the database an estimated number of devices that have already been replaced before the evaluation time to not exist in the database, obtain the degradation level at the evaluative inspection time of each of as many devices as the estimated number by using at least the former of the base case examples and the degradation prediction model, and generate first virtual case examples including the degradation level at the evaluation time of devices whose obtained degradation level at the evaluative inspection time does not meet the replacement condition based on the base case examples and the degradation prediction model, calculating the degradation level at the evaluative inspection time of devices whose first case example have same periodic inspection time as the evaluation time from the first case examples of those devices and the degradation prediction model, and select first case examples of devices whose degradation level at the evaluative inspection time does not meet the replacement condition; and evaluating configured to evaluate the evaluation maintenance strategy by using generated first virtual case examples and selected first case examples.
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13. A data analysis method, comprising:
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providing a database configured to store for each of a plurality of devices one or more second case examples each including inspection time information which indicates an inspection for which of a plurality of periodic inspection times has been performed, the degradation level of the device, operation characteristics of the device, and replacement information indicating whether the device should be replaced or not; providing a evaluation maintenance strategy including an evaluative inspection time which indicates a time at which a periodic inspection should be conducted instead of the plurality of periodic inspection times, an evaluation time indicating a time at which degradation of the devices is to be evaluated and which is later than the evaluative inspection time, in a case that the periodic inspection is conducted at the evaluative inspection time instead of the plurality of periodic inspection times, and a replacement condition indicating a condition for replacing the device based on the degradation level of the device; providing a degradation prediction model for predicting the degradation level of the device from the operation characteristics of the device; obtaining the degradation level at the evaluative inspection time for each device whose second case example has a periodic inspection time which precedes the evaluation time and having replacement information indicating that the replacement should be conducted, by using at least the former of the second case example of each device and the degradation prediction model, and generating second virtual case examples each including the degradation level at the evaluation time for the device whose obtained degradation level at the evaluative inspection time does not meet the replacement condition based on the second case example of the device and the degradation prediction model, calculating the degradation level at the evaluative inspection time for each device that have same periodic inspection time as the evaluation time by using at least former of the second case example of the devices and the degradation prediction model, and selecting the second case example having same periodic inspection time as the evaluation time from among second case examples of each device whose calculated degradation level at the evaluative inspection time does not meet the replacement condition; and evaluating the evaluation maintenance strategy by using generated second virtual case examples and selected second case examples.
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Specification