What could be more important than a person's health. Here we see Statistical Thinking applied to -ease-someones pain. This "operational Level case
study powerfully demonstrates the broad applicability of Statistical Thinking. It is an example of the third principle of Statistical Thinking, "Understanding and reducing variation are keys to
success." Understanding the variation in the process was a vital step toward making progress. Once Tom and Carolyn had a better understanding of the variation in the process, they were able to apply tech-
niques to reduce that variation. The results were heartwarming, "... I can tell you for sure I know it worked because I feel a lot better now than I did before we started!" Can there be any better reason for applying Statistical Thinking in every part of
lives?!