Thank you for the description of CBC.

I'm curious about it and your thinking on how to track things over time and see what has surprised us since we got started. It is useful to note down every time you (or your team) sets an expectation with someone (or another team) and then make sure you don't forget about that. It's also useful to be deliberate when setting expectations.

Having a public journal could well work for noting down when expectations are set and whenever there is a meeting of minds. I've found when tracking things like this that the amount of data can quickly grow to the point where you can no longer quickly and easily reason about it. The success seems to live and die on the data visualization or UI/UX.