What does maintenance typically involve?

Maintenance typically involves the ongoing processes aimed at keeping equipment in good working order and repairing it as necessary. This includes routine inspections, preventive maintenance activities, and any repairs needed to ensure that machinery functions effectively and efficiently. The focus is on sustaining the existing equipment's performance and reliability, minimizing downtime, and extending its lifespan through regular maintenance protocols.

In contrast, other options involve actions that are not primarily about maintenance. Installing new equipment pertains to the introduction of new systems rather than maintaining current ones. Replacing old machinery suggests a significant upgrade or overhaul, rather than the preservation of existing equipment. Training employees on new processes, while beneficial for operational efficiency, does not directly pertain to the maintenance of equipment itself. Thus, the correct understanding of maintenance centers on the care, upkeep, and repair of existing machinery.