The Science of Engineering & Business

After more than 40 years of consulting, teaching, and applying statistical methods to real-world engineering and scientific problems, I have decided to retire from active consulting through Sigma Science Inc. Since beginning my career, I have had the opportunity to work with thousands of engineers, scientists, and practitioners across a wide range of industries and around the world. My work has included some of the early applications of Six Sigma, experimental design, sampling, measurement systems, process improvement, and the practical application of statistics to engineering problems. Over the years, my thinking has evolved. I have come to believe that the most valuable skill is not knowing which methodology to follow, but knowing how to think about a problem. Good engineering begins with understanding the system, asking meaningful questions, identifying what can vary, and using data to learn. Statistical methods are tools to support that process—not substitutes for critical thinking. That philosophy has shaped my teaching and consulting for many years, and it is the foundation of the material I have developed through Sigma Science. Although I am retiring from active consulting, I am not walking away from the ideas. I plan to continue writing, refining, and sharing what I have learned about critical thinking, scientific methodology, and applied statistics. The course materials and other resources developed over the years will continue to be available for those who find them useful. I am grateful to the many clients, colleagues, students, and friends who have contributed to my journey. The opportunity to learn alongside so many talented people has been one of the most rewarding parts of my career.

Thank you for being part of the journey.