Pareto's Principle: you generally spend 80% of your time on 20% of the project.
Quality planning consists of developing the products and processes required to meet customer's needs
For many phenomena, 80% of consequences stem from 20% of the causes.
...every successful quality revolution has included the participation of upper management. We know of no exceptions.
All improvement happens project by project and in no other way.
Observing many companies in action, I am unable to point to a single instance in which stunning results were gotten without the active and personal leadership of the upper managers.