How Agile can Analytics be?

As many practitioners and Project Managers know, managing SDLC projects has its own nuances - and typically, there are some proven (?) methods of managing large accounts - waterfall and other such methods. However, What we do here is to see how to successfully incorporate Agile practices in managing Analytics assignments. From my experience in both managing web-based applications and Analytics assignments, Analytics is not as "malleable" to following a set of SDLC process. I would love to hear thoughts from enthusiasts on what their experiences are in this. What process do they follow? What has proven successful?