March 2009
Intermediate to advanced
515 pages
13h 12m
English
Content preview from Software Engineering and Testing
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Chapter 9
SOFTWARE MAINTENANCE AND
PROJECT MANAGEMENT
9.1 SOFTWARE AS AN EVOLUTION ENTITY
L
ehman and Belady have studied the characteristics of the evolution of
several software products [1980]. They have expressed their observations in
the form of laws. Their important laws are given below.
1. Lehman’s first law: A software product must change continually or become
progressively less useful.
2. Lehman’s second law: The structure of a program tends to degrade as more
and more maintenance is carried out on it.
3. Lehman’s third law: Over a program’s lifetime, its rate of development is
approximately constant.
9.2 SOFTWARE-CONFIGURATION MANA ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.