Making a wrong decision is understandable. Refusing to search continually for learning is not.
Most things don't work like they are supposed to work.
Improving quality requires a culture change, not just a new diet.
Quality has to be caused, not controlled.
Quality is the result of a carefully constructed cultural environment. It has to be the fabric of the organization, not part of the fabric.
You are going to be measured anyway by some means, fair or foul. Usually the one doing the measuring has nothing specific in mind; so he does it by the seat of his pants. Careers are destroyed in this manner.