I came across this article today, where the author talks about prioritising bugs in order to control churn and get a shippable product. At the end he also brings up the question, "What is a bug". To me, this would also lead on to the "How do you report a bug" - most people log really bad bug reports (and I'd expect that is why so many software houses will log, then suspend bugs - lousy reports make it impossible to duplicate problems).