A more appropriate question is not, does software estimation help improve project management, but is project management a suitable model for software?<p>I am a proponent of the idea software is a new form of literacy.  We generally do not project manage the next paragrpH or the next chapter.  writers are often faced with deadlines, but rarely have to justify themselves on a daily basis.<p>Improving estimation will just result in slightly better inputs to a process that at best hinders us and sucks creativity and joy.