Which of the following best defines preventive maintenance?

Preventive maintenance is best defined as routine services scheduled based on measurable intervals. This approach involves planning maintenance tasks to occur at regular intervals, such as mileage, usage hours, or time periods, in order to prevent unexpected failures and prolong the life of equipment. It emphasizes a proactive strategy, which includes tasks like oil changes, filter replacements, and system checks, all aimed at maintaining the vehicle's operational efficiency and safety.

By focusing on scheduled maintenance rather than reactive measures, preventive maintenance helps organizations minimize downtime and avoid costly emergency repairs that could arise from neglecting essential upkeep. This approach is essential for effective fleet management, as it allows for better budgeting, resource allocation, and overall vehicle reliability.