To my wife Roxy, my girls Jessica, Melanie, and Ashley, and my boys Harry, Macklin, and Finian. Thanks for the inspiration and the free time to work on this project. I mention you often in my courses to demonstrate the relevance of these problem-solving methods in meeting life’s many challenges. Did I mention Black Belts get a higher allowance? Love Dad.

Get Six Sigma Demystified, Second Edition, 2nd Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.