Six Features

Eston Martz's picture
Eston Martz
In my last post, I told you how I had double-checked the analysis in a post that involved running the Johnson transformation on a set of data before doing normal capability analysis on it. A reader...
Eston Martz's picture
Eston Martz
I don’t like the taste of crow, which is a shame, because I’m about to eat a huge helping of it. I’m going to tell you how I messed up an analysis. But in the process, I learned some new...
Joel Smith's picture
Joel Smith
Last month, the ESPN series Outside the Lines reported on baseball pitchers suffering serious injuries from being struck in the head by line drives, and the efforts that Major League...
Davis Balestracci's picture
Davis Balestracci
This is a continuation of my last column, which I’ve written to honor my late dad who loved golf. As promised, let’s look at the Masters golf tournament final four-round scores for the 55 players...
Matthew E. May's picture
Matthew E. May
No, this isn’t an opinion piece or in any way a critique. It’s more like a public service announcement for business professionals in the job market, looking for a strategy position with a market...
Quality Transformation With David Schwinn's picture
Quality Transformation With David Schwinn
“If we are to achieve a richer culture, rich in contrasting values, we must recognize the whole gamut of human potentialities, and so weave a less arbitrary social fabric, one in which each diverse...
Brian Maskell's picture
Brian Maskell
T here are three ways in which a standard costing system is typically used in a manufacturing company: 1. Performance measurement 2. Decision making 3. Inventory valuation From an accounting...
Fred Schenkelberg's picture
Fred Schenkelberg
Control charts provide an ongoing statistical test to determine if a recent reading or set of readings represents convincing evidence that a process has changed from an established stable...
Patrick Runkel's picture
Patrick Runkel
I’ve never understood the fascination with selfies. Maybe it’s because I'm over 50. After surviving the slings and arrows of a half a century on Earth, the minute or two I spend in front of the...
Bruce Hamilton's picture
Bruce Hamilton
The last few weeks for me have been all things Shingo, including a presentation at the Shingo Institute’s International Conference three weeks ago in Provo, Utah, followed by four days of Shingo...
Patrick Runkel's picture
Patrick Runkel
It’s usually not a good idea to rely solely on a single statistic to draw conclusions about your process. Do that, and you could fall into the clutches of the “duck-rabbit” illusion shown below. If...
Brian Maskell's picture
Brian Maskell
It is vitally important for lean people to know nothing when working on improvement. This sounds like a crazy idea, but it is another 100-percent turnaround from traditional management thinking....
Rip Stauffer's picture
Rip Stauffer
Recently, in one of the many online discussion groups about quality, Six Sigma, and lean, this question was posed: “Can X-bar R and X-bar S be used interchangeably based on samples size (n) if the...
Dawn Keller's picture
Dawn Keller
Generally speaking, I have a problem with authority. I don’t like being told what to do or how to do it. I’m not proud of that. I recall debating with my high school trigonometry teacher regarding...
Jens R. Woinowski's picture
Jens R. Woinowski
As you browse through lean management pages on the Internet, you may have seen reports on companies having little success with lean, or comments about how misunderstanding lean can lead to bad...
Eston Martz's picture
Eston Martz
Last week I attended the American Society for Quality’s World Conference on Quality and Improvement in Nashville, TN. The ASQ conference is a great opportunity to see how quality professionals are...
Steve Daum's picture
Steve Daum
The ability to make predictions has always been rewarded. Statistician Donald J. Wheeler says that “prediction is the essence of business.” With growing bodies of data and good analytical models,...
Donald J. Wheeler's picture
Donald J. Wheeler
Parts per million (ppm) is part of the language of Six Sigma. It pervades the sales pitch and is used in all sorts of computations as a measure of quality. Yet what are the rules of arithmetic and...
Bruno Scibilia's picture
Bruno Scibilia
The Cp and Cpk are well-known capability indices commonly used to ensure that a process spread is as small as possible compared to the tolerance interval (Cp), or that it stays well within...
Quality Transformation With David Schwinn's picture
Quality Transformation With David Schwinn
Let’s begin with yet another example of a lack of understanding of the Perversity Principle, this one from a recent The Times of India report. “Authorities in India have reportedly arrested some...