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Adding enhancements after product release
I was curious if anyone has any documentation or numbers that say how adding functionality or enhancements to software after it has been released (instead of just doing bug fixes) effects quality.
I would think if you add a big change to your software, it would require a lot of testing of not only the new functionality but of existing functionality that may be effected as well. If anyone has this information available, I would love to see it.
Re: Adding enhancements after product release
Look up regression testing, it will explain what your looking for.