Condition-Based Maintenance (CBM)
A maintenance strategy where work is triggered by the actual measured condition of equipment rather than by elapsed time.
Condition-based maintenance replaces the calendar with evidence. Instead of overhauling a pump every six months regardless of its state, CBM monitors indicators — vibration, temperature, current draw, oil condition, pressure differentials — and triggers intervention only when a measurement crosses a defined limit or trend. Work happens because the equipment says it is needed.
The economic logic addresses both failure directions: it avoids the unplanned breakdown that time-based schedules miss, and the unnecessary intrusion that time-based schedules impose on healthy machines. Since most failure modes are not age-related, condition monitoring covers ground that calendar PM cannot.
CBM requires three things to work: reliable measurement (sensors or disciplined inspection routes), defensible limits (from standards such as ISO 10816 vibration zones, OEM data, or learned baselines), and a closed loop from alert to work order. It is the operational foundation on which predictive maintenance builds.
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