What are the tasks of system maintenance?

 The last phase of the systems development life cycle (SDLC) is maintenance. Maintenance is a misnomer; the work done during this phase is either to fix the system so that it works correctly or to adapt it to changes in requirements. First, there needs to be a means for tracking both failures and requests for enhancements to meet new requirements. For small systems, organizations can track failures and enhancements using word-processing documents. Typically, IS personnel prioritize system problems according to their severity. They fix high-priority items as soon as possible, and they fix low-priority items as time and resources become available.

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