Dr. Elbie does a pretty good job of explaining Yes/No Charts. When people first hear about them they dismiss them as primitive. But the bulk of the resistance to change or modifying of Tribal Knowledge and integrating it into the mainstream of the business process requires a formal behavior modification tool. And that is the Yes/No Chart. It is very powerful measure of a team, particularly one that is protecting or dealing with secretive Tribal Knowledge. Once the measurement is in place, you are measuring the team’s collective behavior and not an individual. That makes it easy to change the resistance of those who were working under a Tribal Knowledge process. They can save face and feel proud of the improvement that they have achieved under the banner of No Blame.