Six Features

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...
Bob Emiliani's picture
Bob Emiliani
Regular readers of my column, as well as my Twitter and LinkedIn feeds, will know that in recent months I have posted many critiques on various aspects related to the products,...
Michelle Shemo's picture
Michelle Shemo
As a member of Minitab’s technical support team, I get the opportunity to work with many people using design of experiments (DOE). People often will call after they’ve already chosen their...
Bruno Scibilia's picture
Bruno Scibilia
Suppose you have designed a brand-new product with many improved features that well help create a much better customer experience. Now you must ensure that it’s manufactured according to the best...
Patrick Runkel's picture
Patrick Runkel
Right now I’m enjoying my daily dose of morning joe. As the steam rises off the cup, the dark, rich liquid triggers a powerful enzyme cascade that jump-starts my brain and central nervous system,...
Quality Transformation With David Schwinn's picture
Quality Transformation With David Schwinn
Last weekend we took all 16 members of our family on a ski trip. It was amazing, and we are incredibly lucky. We haven’t done such a thing in 17 years, when our first grandchild, Claire,...
Davis Balestracci's picture
Davis Balestracci
In my last column, I discussed how even a well-designed study with a statistically significant result doesn’t necessarily mean viability in the real world. Post-study, one must study the...