What type of maintenance involves immediate repair after a breakdown?

The correct answer is focused on the concept of corrective maintenance. This type of maintenance specifically addresses situations where equipment or systems have failed and require immediate repair to return to operational status. The key characteristic of corrective maintenance is that it is reactive, meaning it occurs after an issue arises, rather than being planned in advance.

Corrective maintenance contrasts sharply with preventive maintenance, which aims to prevent issues by performing regular maintenance tasks before equipment failure occurs. Predictive maintenance involves monitoring equipment conditions to predict failures before they happen, allowing for timely interventions without waiting for a breakdown. Scheduled maintenance refers to maintenance activities that are pre-planned based on a timetable, rather than being in direct response to a fault or breakdown.

In summary, corrective maintenance is essential for quickly addressing and resolving equipment failures, minimizing downtime, and restoring functionality as promptly as possible.