volume_mute
Waterfall and maintenance
publish date: 2026/05/28 22:08:34.123301 UTC
volume_mute
Operation and maintenance is often the longest phase in the waterfall life cycle.
Which of the following activities is not typically part of maintenance?
Correct Answer
Developing a completely unrelated system for another customer
Explanation
Maintenance focuses on correcting defects, improving implementation, and adding new functionality to the existing system, not building unrelated systems.
Reference
Software Engineering, Ian Sommerville, 9th edition