Derail?

So what is the cause? Again, the miracle really didn’t occur.
In agile transformations, we have noted that one pebble can derail the process. Think of a big round rock at the top of a hill. The rock is the transformation. The hill is the organization. It takes an amount of effort to begin to move the rock down the hill to start with, but one you over come the transition from potential to kinetic and get it rolling, usually momentum will take over and the process will continue to flow. However, to be successful, we must continually sweep the path like the sweepers on a curling team. What we find is that if our rolling rock of change hits even the littlest pebble remaining on the path it will deflect off the path and the transformation will at best continue forward but with an unknown trajectory.

Acknowledging that it is far easier to derail the transformation than it is to instantiate and maintain, what can we do to increase and maintain our probability of success?