What category does "corrective maintenance" fall into within the 3-M System?

In the context of the 3-M System, corrective maintenance is specifically defined as maintenance activities that are conducted to restore equipment to a fully operational status following a failure or issue. This type of maintenance allows for the immediate addressing of problems that have caused equipment malfunction, ensuring that the equipment can continue to function as intended.

Unlike maintenance that is focused on upgrades or aesthetic improvements, or maintenance aimed solely at preventing future issues, corrective maintenance is reactive; it responds to existing problems by fixing them, thus directly contributing to the availability and reliability of equipment. This distinction is crucial in understanding the role of corrective maintenance within the broader framework of maintenance management.