Two thirds of large-scale change programmes don’t meet their goals
There are thousands of attempts at agile adoption involving hundreds of thousands of Certified ScrumMasters

So...
why don't we have thousands or at least hundreds of case studies from successful agile transformations?
why are many organisations still depending on continuous coaching?
why have many organisations fallen back?

Even combining top-down and bottom-up approaches often still falls far short of our expectations as the status quo stubbonly endures.

So what's a more effective approach? 

Over decades and even millenia, humans have devised games, rites-of-passage and other techniques to achieve transitions from one state to the next. Open Agile Adoption combines several of these techniques into a framework you can use to achieve both rapid and sustained transformation.