| 摘要 |
A method of determining growth and return rates in equipment includes the step of producing commissioning records and failure records. The commissioning records and the failure records are arranged in sets of records, the sets being in chronological order of in-service date. Each set of records is then addressed successively and a new record is produced between consecutive sets of records according to pre-defined conditions. Within each set of records, there is produced a natural logarithm of cumulative in-service time in hours value and a natural logarithm of cumulative percent failures per year value. Slope and intercept values of a best-fit curve applied to an X data set comprised of the natural logarithm of cumulative in-service time in hours values of the last records in each set and a Y-data set comprised of the natural logarithm cumulative percent failures per year fields of the last records in each set are then calculated, the slope value representing the growth rate of the equipment.
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