| 摘要 |
A part fault table indicating the number of days used, a fault flag and a first weight is generated for each of plural parts. A survival curve and a hazard function for each of the plural parts are also generated. Then, convergence is determined by calculating a hazard value using the hazard function for each part in the same group, calculating a second weight by normalization using the hazard value of each part and comparing the first and second weight with each other. Finally, a control operation is performed in such a manner that the convergence determination is terminated by outputting the survival curve or updates the first weight with the second weight, while a new survival curve and a new hazard function are generated from the part fault table using the updated first weight, after which the convergence determination is determined again.
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