Many systems professionals feel that perfective maintenance is not really maintenance but rather new development.
Perfective maintenance, also known as enhancement or proactive maintenance, refers to making modifications or improvements to a software system to enhance its functionality, performance, or usability. This type of maintenance goes beyond fixing bugs or addressing issues and involves adding new features, optimizing code, improving user experience, or adapting the system to changing requirements.
Some systems professionals argue that perfective maintenance is closer to new development because it involves significant changes to the system's existing codebase and functionality. It can require substantial design and implementation efforts similar to those involved in creating new features from scratch.
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