[spookthesunset]

The other thing with five whys is many times the root cause is beyond your teams control. Unless the entire management chain from the top participates you'll not see the organizational change needed. And even then, upper management might just consider the reasons for the failure as a cost of doing business and won't want to change it.

That being said, the process at least forces the team to look at root causes beyond what is visible on the surface. It's a good start but it isn't perfect either.