Preventive Maintenance Task Selection - Continued

DOE-STD-1052-93

8.1.2.3

This section describes how PM tasks are determined to be

applicable and effective.

All PM tasks recommended from the LTA shall be evaluated to

ensure that they meet applicability and effectiveness

requirements. Each PM task should be evaluated considering

the failure it prevents. The applicability of a task depends on

its ability to change the way a component fails and its failure

rate. Applicability requirements are different for condition-

monitoring and time-directed tasks. The requirements for

selection of a condition-monitoring task include the following:

The task shall be able to detect a component's degraded

condition or performance.

The failure shall be plausible and capable of being

detected using condition-monitoring techniques.

The failure shall be predictable as it progresses from a

potential failure to a functional failure.

The applicability requirements for time-directed tasks include

the following:

The failure does not have detectable parameters or the

parameters cannot be measured.

The component should be in operation for the specified

period of time.

The task shall restore the component's condition and

reduce the likelihood of failure to an acceptable level.

D - 38