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 applicabil-ity 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 varia tion 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?!