Answer :
Many organizations spend more time and money on the systems Maintenance phase than on any of the other phases.
In order to fix bugs, boost performance, or adapt to a changing environment, a software system or module must go through a process known as system maintenance.
One technique that assists in updating, modifying, and upgrading software to meet customer needs is system maintenance. Once the software is released or launched, maintenance work is done for a variety of reasons, such as enhancing the software as a whole, fixing errors or problems, boosting performance, and more.
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