What does corrective maintenance primarily focus on?

Corrective maintenance primarily focuses on fixing identified bugs within a system or software. This type of maintenance is crucial because it addresses issues that disrupt the functionality of applications or systems, ensuring that they operate as intended. When bugs are identified—be it through user feedback, automated testing, or system monitoring—corrective maintenance steps in to analyze the issue, determine its root cause, and implement a fix.

The essence of corrective maintenance lies in its reactive nature; it is performed after defects are discovered rather than being planned in advance. This approach helps maintain system integrity and user satisfaction by swiftly restoring buggy software to its optimal state.

In contrast, enhancements to user interfaces pertain to improving user experience or aesthetic aspects of the software, which falls under adaptive or preventive maintenance rather than corrective. Updating software documentation focuses on maintaining clear and accurate records of software changes and is not directly related to fixing bugs. Modifying performance metrics involves analyzing and tweaking system performance indicators, which does not directly address bugs but rather focuses on measuring and improving system efficiency and effectiveness.