What is the difference between reactive and preventive maintenance?
Reactive maintenance fixes an asset after it fails or a fault is reported, while preventive maintenance inspects and services assets on a schedule to stop failures happening. Reactive work is unplanned and often urgent, so it tends to cost more in downtime and emergency call-outs. Preventive work is planned and steadier, trading a known regular cost for fewer surprise failures. Almost every site runs a mix of both, and the useful measure is the ratio between them: a site dominated by reactive work is usually one where preventive maintenance is being skipped or where assets are ageing, and shifting the balance toward planned work is what reduces cost and disruption over time.

