Which stage of the software development cycle is focused on correcting issues after the software has been deployed?

The maintenance stage of the software development cycle focuses on correcting issues that arise after the software has been deployed. This phase is crucial as it ensures that the software continues to function properly and meets the users' needs. During maintenance, developers address bugs that may emerge, perform updates to adapt to changing requirements, and enhance features based on user feedback.

This aspect of the software lifecycle is essential for the longevity and usability of the software, as no software is perfect at launch. The maintenance phase helps in identifying and rectifying issues that were not discovered during earlier stages like testing or development. In contrast, the design, development, and testing stages deal with the initial creation and evaluation of the software, rather than post-deployment corrections.