Using the Range to Estimate Variability (d₂, d₂*): A Practical Guide to t-tests, F-tests, and Confidence Intervals Abstract This article explains how the statistical range can be applied as a practical estimator of process spread in quality engineering and research. By using the range to estimate variability, practitioners can approximate the population standard deviation efficiently […]
Six Sigma
Using the Range to Estimate Variability (d₂, d₂*): A Guide to t, F, CI
Computing Process Improvement Cost Savings Using Total Resource Productivity
Computing process improvement cost savings can often be a challenge. In my opinion, Total Resource Productivity (TRP) is a great way to compute project savings. Other methods, such as the Cost of Poor Quality are also great ways to compute projects savings. But, the Cost of Poor Quality requires some accounting maturity to track. It […]
Why Do Business Process Improvement Initiatives Fail?
Say No to Business Process Improvement Initiatives when it’s NOT in the best interest of a Potential Client. If you work for any small or medium size company chances are you have had to lead or support a business process improvement initiative. New business process improvement initiatives, such as Six Sigma, Lean, or Lean Six […]
What is the future of Six Sigma?
Based on the Red line – What is the future of Six Sigma? Since 2004, the interest in lean manufacturing (blue line) is stable. But, Six Sigma has declined for some time (red line). What is the future of Six Sigma? Does this decline suggest Six Sigma is unpopular? I don’t believe so. I think […]
Online Six Sigma Project Coaching Saves Time and Money!
Online six sigma project coaching saved my clients money. Six sigma project coahing supports collaboration and enhances learning, and I travelled a lot to provide this mentorship. I can remember traveling on Sunday and meeting with clients Monday morning. I would spend the entire week coaching black belts then catch a plane and get home […]