Some of these product managers may have been legitimately frustrated with problems caused above their pay grade (such as VPs who overschedule engineering and make threats if deadlines aren’t met; this leads to bugs, incidentals, and new priorities being ignored and it destroys morale). But product managers, at least some of you are the problem.
via cindyalvarez.com
5 reasons that product managers might be the bad guys. Be sure that you're doing product management before you start doing somebody else's job.