Earned Value - why does it have to be so difficult?

This paper from the recent PMI-SAC conference describes how to apply a simple approach to Earned Value Management for IT Projects. It starts with the question 'why is EVM so little used?' and puts forward 4 of the more common reasons. The author goes on to describe what was originally used as a paper based method. It exploits the natural structure of IT projects, frequently formalised in some form of stage gate process. Industry norms for the relative breakdown of costs by stage and activity or phase within the stage are used to compare to actual costs.
This approach implies that you do not need a detailed bottom up cost and activity tracking in order to calculate the earned value. Of course, it would mean that you don't have much earned value information during phases and breaking the phases down into very small units may stretch the applicability of the statistics used at the outset.
Of course, the method still requires some work, project structure and some organisational discipline. This can be one of the most difficult of the original four reasons to address - Because sometimes management doesn't really want to know!
Earned Value Management for IT Projects