Which maintenance type is categorized as proactive?

Proactive maintenance is an approach that aims to prevent failures from occurring in the first place. Among the options given, condition monitoring stands out as a proactive maintenance type because it involves regularly assessing the performance and condition of equipment through various means, such as vibration analysis, thermography, or oil analysis. By monitoring conditions continuously, potential issues can be identified and addressed before they lead to equipment failure. This approach not only enhances reliability but can also result in cost savings by minimizing unscheduled downtime and repairs.

In contrast, breakdown maintenance, emergency maintenance, and corrective maintenance are reactive in nature. Breakdown maintenance occurs after equipment has failed, requiring immediate attention to restore functionality. Emergency maintenance is similar, focusing on urgent repairs resulting from equipment breakdowns that pose immediate risks or hazards. Corrective maintenance, while it can involve planned interventions, generally addresses failures that have already occurred rather than preventing them. This differentiation highlights why condition monitoring is the only truly proactive approach among the options.