[JoshTriplett]

> If the process is really as good as it is supposed to be and espoused to be by scrum evangelists (including many of the coaches my companies have hired to help us implement it), then I wonder why it's so hard to do correctly.

I'm quite skeptical of "agile coaches" and similar.

But in general, I'd suggest that it's easy to break by either swapping out or eliminating one of the defined roles, having someone unsuitable for those roles doing them (e.g. a manager or program manager serving as "scrum master", which instantly turns scrum into micromanagement), having an excessive number of mid-sprint changes (if changing a sprint's work mid-sprint happens every other sprint, something is very wrong), or not having any acceptance from the broader organization for getting work done at a regular cadence without constant "emergency interrupts".

You should not be spending any significant fraction of your time in planning meetings; those occur once a sprint at most, and the sprint-planning portion should mostly consist of quickly doublechecking priorities and grabbing the top stories by priority. The other significant effort lies in breaking down and "sizing" stories (which is the job of the development team, not the person providing requirements).

I do agree that Kanban can work as well; it just doesn't (in my opinion) have good predictive power for when work will get done. (On the other hand, some of our teams ended up switching to Kanban because Scrum doesn't work at all with a distributed team.)