You beat me to it ... but I've found that it's really more dependent upon how accurate my idea of "done" is. The more time I put into making an accurate list o

You beat me to it ... but I've found that it's really more dependent upon how accurate my idea of "done" is. The more time I put into making an accurate list of the tasks that have to be completed to call it done, the more accurate my assessment of the 90% point is. What happens when you haven't thought your task list through is that you tend to add items that required to support the MVP's feature list. I actually find it pretty easy to avoid the features that I've decided have to wait for a later version.