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PM-focused risk criteria

From HTMcommunityDB.org

  1. Does the device have any components that must be restored periodically in order to prevent it from developing a wear-out failure that will cause the device to stop functioning and result in a significant adverse outcome? OR
  2. Can the device develop a hidden failure (one that may not be obvious to the user but is detected when the device fails a critical performance or safety test during a PM) that will result in a significant adverse outcome? AND
  3. Can the device develop a PM-preventable failure that will result in a serious, life-threatening (LOS 3) outcome? AND
  4. Is a PM-preventable failure of the device "quite likely" to occur? ("Quite likely" is tentatively defined as more than one PM-preventable failure every 75 years.)

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