Although I do agree bugs may be pushed to the vast abyss of feature requests or "enhancements," the answer is pretty simple: In the waterfall model, if it isn'

Although I do agree bugs may be pushed to the vast abyss of feature requests or "enhancements," the answer is pretty simple: In the waterfall model, if it isn't in the requirements/specifications doc, it isn't a bug. It's put in as feature request and if you're lucky maybe some day years later it will be addressed in a redesign project or a "phase 2", but most of the time it will never happen. In agile, if it's not a story, you put it in the backlog and it will eventually make it into an iteration. For example, as testers, we bring it up to the PM/PO so that he can write a story for it. They'll prioritize and put it in an iteration because the developer will not do anything about it unless it's a story and his time accounted for it.