Effect of Mistakes on a Development Schedule
Michael Jackson (the singer, not the computer scientist) sang that "One bad apple don't spoil the whole bunch, baby." That might be true for apples, but it isn't true for software. One bad apple can spoil your whole project.
A group of ITT researchers reviewed 44 projects in 9 countries to examine the impact of 13 productivity factors on productivity (Vosburgh et al. 1984). The factors included the use of modern programming practices, code difficulty, performance requirements, level of client participation in requirements specification, personnel experience, and several others. They divided each of the factors into categories that you would expect to be associated with low, medium, and high performance. ...
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