Which of the following is a proactive maintenance strategy?

A proactive maintenance strategy is designed to anticipate and address potential issues before they lead to equipment failures. Conducting routine checks and servicing on equipment embodies this approach, as it involves regular inspections, preventative measures, and scheduled maintenance tasks aimed at maintaining equipment health and performance.

By performing these routine checks, you can identify wear and tear, replace parts that are nearing the end of their useful life, and ensure that machinery operates efficiently. This not only helps in reducing unexpected breakdowns but also extends the lifespan of the equipment and minimizes costly emergency repairs.

In contrast, simply fixing equipment only when it breaks down reflects a reactive maintenance strategy, which tends to lead to higher long-term costs and operational disruptions. The other options, such as minimizing training costs or hiring external contractors for maintenance, do not focus on the proactive management of the equipment itself, making them less relevant in the context of proactive maintenance strategies.