defined by The Association for Manufacturing Technology as the percentage of potential production time during which equipment is operable. The term is applied to a single piece of manufacturing equipment (or several machines acting as a unit)
The metric is the average length of operating time between one maintenance action and another maintenance action for an asset or component. This metric is applied only for maintenance actions which require or result in function interruption. → Mean Time Between Maintenance (MTBM)
Systems Covered by Criticality Analysis (%) = [Number of Critical Systems (for which a criticality analysis has been performed) ÷ Total Number of Systems] × 100