MNT.2:5 - Archetypal Grounding

For PS17, the constructed condition history supports a bearing-related deterioration concern. The team retains a condition-informed policy for this failure family because the interpreted signal can support a planned response in the stated use. The present recommendation still depends on actual support and access; an alarm alone does not establish that replacement can fit the next outage.

Consider instead a cheap, accessible indicator lamp whose failure is obvious and has no protection role. If its loss and replacement demand are acceptable, deliberate run-to-failure can be a sound policy. Scheduling repeated intrusive replacement needs an additional gain to justify its burden.

The same choice is unsuitable for an otherwise unobserved protective trip function. Normal production can continue while that function has failed. A suitable failure-finding task addresses that detection problem; an operator’s observation that “the line still runs” does not. The applicable specialist basis determines the test and interval.

In the 48-pump fleet example, the operating exposures differ, and policy selection is not randomized. Four failures versus six do not by themselves justify replacing the policy. Retain the current policy when its existing failure-and-response basis remains adequate; address the known spare-support deficiency on its own existing evidence. Failure to prove a better rival does not establish that the current policy is adequate.