Improving Bug Triage with User Pain (2008)
lostgarden.com
lostgarden.com
My recollections are that we found lots of room for disagreement over whether something was a particular number on one of the scales, and depending on the bug and personalities involved these arguments could last a while. It was straightforward to game the scale to make particular issues show up with a high or low pain, regardless of how many customers actually reported it (if any - unfortunately user pain does not include a 4th 'imagination' rating).
One development manager told me he really liked User Pain because it was straightforward to make defects reflect a low pain number such that they could just be ignored.
It was a short experience, but I don't think I would want to implement user pain again unless the category ratings were entirely data-driven and automated. I don't think this method is useful if you leave the ratings up to people.