Component Failure Trending

DOE-STD-1052-93

If a PM task exists and there are no failures over a significant period

at time, then consideration should be given to increasing the task

interval. In this case, it may be advantageous to use a condition-

monitoring task to determine the optimum task frequency and to

determine if the task is applicable and may effectively detect

degradation before a failure occurs.

The timely collection and analysis of failure data is essential to improve

component performance. Incomplete failure and repair descriptions on

maintenance job requests often hinder timely analysis. One method that has

proven to be effective in obtaining trending information on job requests is

to initiate use of failure and repair codes. Codes established by the, plant

should be easily sorted by computers to facilitate a trend analysis.

Other sources of data that should be used to make adjustments to the PM

program are the plant's performance-monitoring and predictive-monitoring

programs. Results of these programs may provide indications of adverse

trends and may help identify components with performance or reliability

problems.

To be effective in maintaining plant equipment design conditions with high

levels of availability, the PM program shall contain appropriate tasks, be

properly executed, and be routinely reviewed and updated. These activities

should be integral responsibilities of the appropriate groups and receive

commensurate priority and attention. These actions, effectively implemented,

may make a significant contribution to safe and reliable plant operation.

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