Quote: change is the primary agent of faults; large, recent changes are the most likely to fail; frequency of change is a better predictor of faults than size of module or number of developers

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The best [statistical] models predicted numbers of faults … [to a module] … (i.e., [e^0.75 x] the negative of their ages, measured … [the log of] their sizes. … Thus, large, recent changes add the most to … than its size … [p. 6] [This model] illuminate change as the primary agent … [p. 10] other variables do not improve the predictions, … by including either module size or other measures … Moreover, the number of developers touching a module …   Google-1   Google-2

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