Six Features

Bruce Hamilton's picture
Bruce Hamilton
There was a time when it was unfashionable for managers to associate with front-line employees. Alluding to an old adage, I used to joke that you could not even lead the horse (i.e., the manager)...
Donald J. Wheeler's picture
Donald J. Wheeler
There is no virtue in obedience when we do not have a choice. But when we have a choice it helps to understand both the law and the reason behind the law. This column is about bad choices that are...
Walter Garvin's picture
Walter Garvin
The foundation of lean manufacturing is kaizen, or continuous improvement. Although this principle usually targets manufacturing processes, it can also extend to the people who plan and implement...
Danei Edelen's picture
Danei Edelen
With multiple projects vying for your budgetary dollars, every purchase is scrutinized. With regards to statistical process control (SPC) software, companies view it primarily as a production...
Bob Emiliani's picture
Bob Emiliani
Have the leading figures in the lean community walked the “Respect for People” talk? Not in my view. Most of these leaders have only recently begun to understand and embrace the “Respect for...
Bruno Scibilia's picture
Bruno Scibilia
Using statistical techniques to optimize manufacturing processes is quite common now, but using the same approach on social topics is still an innovative approach. For example, if our objective is...
Donald J. Wheeler's picture
Donald J. Wheeler
Much of modern statistics is concerned with creating models which contain parameters that need to be estimated. In many cases these estimates can be severely affected by unusual or extreme...
Mike Micklewright's picture
Mike Micklewright
You and your spouse go out to dinner to your favorite restaurant, on a “date” no less, to celebrate a big anniversary. You have been looking forward to this evening all week, and after a long...
Davis Balestracci's picture
Davis Balestracci
My last article demonstrated a common incorrect technique—based in “traditional” statistics—for comparing performances based on percentage rates. This article will use the same data to show...
Steve Moore's picture
Steve Moore
Up until a few years ago, I wasn’t a big fan of run charts. Why not just go ahead and construct a process behavior chart and move on? Well, sometimes a run chart is more appropriate for certain...
Patrick Runkel's picture
Patrick Runkel
The word “kurtosis” sounds like a painful, festering disease of the gums. But the term actually describes the shape of a data distribution. Frequently, you’ll see kurtosis defined as how sharply “...
Quality Transformation With David Schwinn's picture
Quality Transformation With David Schwinn
Shortly after the death of the brilliant comedian and actor Robin Williams, his daughter Zelda quit Twitter and Instagram following online harassment over his death. How sad. We seem to somehow...
Jim Frost's picture
Jim Frost
In a previous article, I showed why there is no R-squared for nonlinear regression. Anyone who uses nonlinear regression will also notice that there are no P values for the predictor variables....
Davis Balestracci's picture
Davis Balestracci
My last column, “Dealing With Count Data and Variation,” showed how a matrix presentation of stratified count data could be quite effective as a common-cause strategy. I’ll use this column to...
Akhilesh Gulati's picture
Akhilesh Gulati
An important concept within TRIZ is that someone, somewhere, has already solved your current problem. In other words, they have “been there, done that.” Or course, the problem has to be clearly...
Bob Emiliani's picture
Bob Emiliani
The lean community continues to face a problem that hurts efforts to advance progressive lean management: It is the great difficulty in clearly separating and effectively communicating the...
Arun Hariharan's picture
Arun Hariharan
On a recent visit to Japan, I had an opportunity to visit Toyota’s headquarters. During a meeting with some of its top executives, I asked one of them what role the senior leadership played in...
Joel Smith's picture
Joel Smith
Learning to ride a bike is a rite of passage for any kid, so much so that we even use the expression “taking the training wheels off” for all kinds of situations. We say it to mean that we are...
Quality Transformation With David Schwinn's picture
Quality Transformation With David Schwinn
Last evening my wife, Carole, and I attended a celebratory dinner for the family of one of my former students. Luca, my student, originally from Italy, brought his wife, Olivia, and his young...
Patrick Runkel's picture
Patrick Runkel
If you teach statistics or quality statistics, you’re probably already familiar with the cuckoo egg data set. The common cuckoo has decided that raising baby chicks is a stressful, thankless job....