An automatic transfer switch failed to transfer during a utility outage. The investigation finds its maintenance work order was closed in the CMMS without the work being done. Which corrective action BEST addresses the root cause?
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Answer: A
Require a supervisor to verify PM completion before closeout: Correct. The root cause is a process that lets PM work orders close unverified; a completion check fixes it for every work order, not just this switch.
Retrain the technician who closed the work order without doing it: Retraining may be part of the response, but it targets one person; the process still lets any order close without proof.
Replace the failed transfer switch with a newer model: The switch failed for lack of maintenance; new equipment would face the same process gap.
Add a second transfer switch to serve the same critical loads: Redundancy masks the failure without fixing the maintenance process.
Root cause analysis looks past the failed part and the individual to the process that allowed the failure, and fixes that.