Task Frequency Optimization

DOE-STD-1052-93

Results of the evaluations should be used as the basis for appropriate adjustments to

PM task content and frequency. Other actions that also may be needed to keep the

PM program current include the following:

Revise the program scope.

Revise the analysis.

Update documentation.

Perform a new analysis.

Select a different task.

Provide training.

Delete tasks.

Revise procedures.

An example of an adjustment to the PM program is replacing time-directed PM tasks

with condition-monitoring tasks when the as-found condition of the components

indicates that the intervals of the PM task may be increased and that a condition-

monitoring task is applicable. This is a typical change that may result in improved use

of plant resources. Also, PM tasks for components with commitment- or regulatory-

specified intervals, along with the corrective maintenance history of the components,

should be reviewed periodically to determine if the performance or frequency of the

PM tasks is detrimental to the reliability of the components.

9.1.1 Task Frequency Optimization

This section describes one method for optimizing PM task frequency.

Preventive maintenance task frequencies need to occasionally be adjusted to

achieve optimal results. One method effectively used to change frequencies for

nonsafety-related components involves direct observation of the "as-found"

condition of equipment during PM activities. The use of this process may

result in an increase or a decrease in PM task frequency. The following

method to optimize task frequency may be implemented without a substantial

increase in craft or supervisory man-hours.

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