The funding and the political may be there, the pilot worked. What goes wrong is further down the line: the parts that get edited out, usually the parts that made the intervention work in the first place.
This happens through a series of reasonable-looking compromises, and by then, the intervention has been ‘scaled’ but its key ingredients have not.
I have written up what I found in this month’s Applied Insights, along with the three questions I now ask to build a scaling strategy.