A staged model for the software life cycle
Rajlich, V.T.; Bennett, K.H.
Computer
Volume 33, Issue 7, Jul 2000 Page(s):66 - 71
Digital Object Identifier 10.1109/2.869374
Summary:Software engineers have traditionally considered any work after
initial delivery as simply software maintenance. Some researchers have
divided this work into various tasks, including making changes to
functionality (perfective), changing the environment (adaptive),
correcting errors (corrective), and making improvements to avoid future
problems (preventive). However, many have considered maintenance
basically uniform over time. Because software development has changed
considerably since its early days, the authors believe this approach no
longer suffices. They describe a new view of the software life cycle in
which maintenance is actually a series of distinct stages, each with
different activities, tools, and business consequences. While the
industry still considers postdelivery work as simply software
maintenance, the authors claim that the process actually falls into
stages. They think both business and engineering can benefit from
understanding these stages and their transitions
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