Bugs / Source Code

This at least is how it always feels: a mystical 10% of the code base causing 90% of the reported bugs.  This makes it very important to identify the 10% of the code that is causing the bugs and then resolve those issues as a matter of priority.  Wasting effort on the other 90% of the code base until the problem 10% is resolved will not make a noticible improvement in the product quality.

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