Reportable Condition — This is an abnormal condition that requires correction. A reportable condition could be either a root cause or an active failure event or fault.
Proactive Domain — This is the period of time when there is a reportable root cause condition but no significant loss of machine life has occurred. Unless detected and corrected, the condition will advance to the predictive domain.
Predictive Domain — This follows the proactive domain and is also known as the failure development period. The predictive domain begins at the inception of a reportable failure condition (e.g., severe misalignment) or fault and ends at the approaching end of operational service life.
RUL — Remaining useful life is an estimate of the remaining service life of a machine when an active wear or failure condition has been detected and remediated. Machines start with an RUL of 100 percent. As they age and wear occurs, the RUL approaches zero.
Root Cause (RC) Saves — Root cause saves is the percent of reportable conditions that were detected and remediated in the proactive domain. The hgher this number the better. All RC saves leave RUL unchanged.
Predictive Saves — This refers to reportable conditions that have advanced to the predictive domain and are detected and remediated prior to operational failure. The RUL of the machine was lowered during the time the reportable condition remained undetected and uncorrected in the predictive domain.
X — This is a timeline point when a reportable condition (e.g., root cause of a fault) is detected and remediated. It also represents operational failure when not detected in the proactive or predictive domains.
Misses — Misses refer to the percentage of reportable conditions that advance to an undetected operational failure. The lower this number the better.
Overall Condition Monitoring Effectiveness (OCME) — This metric defines the overall effectiveness of condition monitoring (inspection combined with technology-based condition monitoring). This is quantified as the average change in percent of remaining useful life (RUL) across all machines and reportable conditions during the reporting period. The higher this number, the more effective condition monitoring is at detecting and correcting reportable conditions early.
Condition Monitoring Interval — This refers to the time interval between technology-based condition monitoring events (vibration, oil sampling, thermography, etc.).
Condition Monitoring Intensity — This refers to the number of condition monitoring technologies in use and the intensity of their use. For example, an oil analysis test slate involving numerous tests with skillful data interpretation would be referred to as intense.
Inspection Interval — This refers to the time interval between machine inspections by operators and technicians.
Inspection Intensity — This refers to the number of inspection points and the examination skills of the inspector.