How do we fix quality?

Fixing quality, as a practice and profession, is a single job with two parts. 

The first part requires knowledge of variation. It requires knowledge of the two types of variation and their influence. 

The second part requires the knowledge and know how to build, understand, and interpret process behavior charts. As the locomotive of continuous improvement, the process behavior chart is the only tool capable of making sense of variation. It is the only tool capable of turning data into insights and insights into actions that result in quantifiable change.