Greece is a topic that shows us in no uncertain terms that, despite the deeper integration that the crisis brought about in Europe, the euro-area member states are ultimately still responsible for their own affairs.
Firstly, the time taken is inherently uncertain. People’s learning styles and development rates differ. And some people are just more decisive than others. Secondly, and perhaps more importantly, the input to the process can be noisy and uncertain. Think of the example of detecting and concluding that a structural change has occurred in the economy. That’s a signal extraction problem.