Many researchers have documented the fact that maintenance programmers spend about 50 percent of their time trying to comprehend the programs they maintain. One interesting source of this statistic is Characterizing and Understanding Development Sessions by Romain Robbes and Michele Lanza. This isn't a case of a study that makes a shocking claim that seems to defy common sense—this finding has been repeated in many studies over the last two decades. It's real, and IT managers ...

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