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Bruce Hamilton
A short time after I moved into operations as the vice president of manufacturing, our assembly department made an early and, dare I say, imperfect attempt to realign the factory floor for ease-of-material delivery and pick up. I would not describe this as improved flow because we were still…
Jay Arthur—The KnowWare Man
At a recent health-care conference I had a conversation with Mary, a Six Sigma Black Belt for a 700-bed hospital. She told me that the hospital had only a few copies of Minitab software, which was shared by several people. She was always being asked to close out of the program so that someone…
Donald J. Wheeler
From the perspective of data analysis, rare events are problematic. Until we have an event,
there is nothing to count, and as a result many of our time periods will end up with zero counts.
Since zero counts contain no real information, we need to consider alternatives to counting the rare…
Jay Arthur—The KnowWare Man
For the last decade, people have come by my booth at the American Society for Quality (ASQ) World Conference on Quality and Improvement and asked: “Isn’t there a better way to implement Six Sigma that doesn’t cost so much or take so long?” Of course there is, but conventional wisdom inhibits…
Jay Arthur—The KnowWare Man
Ask almost anyone what is the No. 1 requirement for Six Sigma success, and he will say: top leadership commitment. It’s easy to look at Six Sigma successes like General Electric (GE) under Jack Welch and use them as evidence of the power of leadership commitment. The belief is so often repeated…
Mark R. Hamel
Some lies you can see a mile away: “The check is in the mail.” “Your table will be ready in a few minutes.” “I didn’t say that.” “This won’t hurt a bit.” Add to this rather long list some lies of the lean variety. I’ve heard more than my fair share.
Often, I just shake off the falsehoods and…
Steve Moore
The quote “Baseball been berry, berry good to me” comes from one of my favorite Saturday Night Live skits from the late 1970s. Garrett Morris played Chico Escuela, a retired Hispanic baseball player who knew very little English. His pat answer for most questions—“Baseball been berry, berry good…
Bruce Hamilton
I was listening to Alan Robinson present recently at the Lean Systems Summit about the power of “small ideas.” Alan wondered aloud why so many organizations continue to pursue the few million-dollar ideas while small ideas account for more than 75 percent of the innovation outcome.
I reflected…
Mark R. Hamel
Regular tiered meetings are a staple of any company’s lean management system. The quick stand-up meetings represent part of the daily accountability process which, when combined with leader standard work and visual controls, provide the foundation for sustaining gains, rigorously practicing…
Davis Balestracci
Any article about control charts leads to inevitable (and torturous) discussions of special cause tests—all nine of them. No wonder confused people continue to use things like trend lines. But I’m getting ahead of myself.
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First of all,…
Steven Ouellette
Let's face it—many industrial researchers, including Six Sigma Black Belts, do a terrible job of planning the research they need to do to perform their jobs efficiently. See that guy over there? Yeah, he is the one I am talking about, so you should read this article so you can help the poor…
John Flaig
A run chart is a graphical display of data over time. Run charts are used to visually analyze processes according to time or sequential order. They are useful in assessing process stability, discovering patterns in data, and facilitating process diagnosis and appropriate improvement actions.…
Mark R. Hamel
First, the introduction. This post was earnestly written by my friend, Jeff Fuchs. He’s the director of the Maryland World Class Consortia, a lean nonprofit assistance organization in the mid-Atlantic. He’s also president of Neovista Consulting, which works with large and small organizations on…
Donald J. Wheeler
With the use of statistical software, many individuals are being exposed to more than just measures of location and dispersion. In addition to the average and standard deviation, they often find some funny numbers labeled as skewness and kurtosis. Since these numbers appear automatically, it is…
Minitab LLC
C
otton. Given that it’s the most widely used fiber in clothing, you’re probably wearing some right now. We love cotton’s comfortable properties and soft feel. But as everyone who’s ironed a cotton shirt or pants knows, these same properties can make cotton-based fabric particularly prone to…
Bruce Hamilton
Significant digits, the number of digits to the right of a decimal point that are warranted by the accuracy of the means of measurement, are a critical part of scientific investigation. In developing products and services, the concept is essential. For example, how many products have failed to “…
Productivity Press
Of the 100 companies named to Fortune magazine’s list of the world’s largest companies in 1956, only 29 of them remain on that list today. Many lost their way because they failed to recognize the changes taking place, or were too big to react quickly enough to shifting market conditions.…
John Flaig
Story update 7/08/2011: We corrected an error in Figure 2, and in the section preceded by "Expressed symbolically for a stable process...".
Two topics that have generated significant interest and frequent comments are, “Is normality required for control charts?” and “You need to estimate the tail…
Steven Ouellette
Although we may use the define, measure, analyze, improve, control (DMAIC) mnemonic to help guide us through our problem solving, that doesn’t really give us a lot of specific direction (as I bemoan in my Top 10 Stupid Six Sigma Tricks No. 4). Good experimental design technique is critical to being…
It seemed like a good idea at the time to Jon Shupenus, U.S. Army Forces Command’s process improvement specialist and lean Six Sigma Black Belt. Shupenus was attending a Department of Defense performance management seminar in 2010 when Kirk Nicholas, director of the Army’s continuous process…
Stewart Anderson
Not all customers are equally profitable. Different customers have different needs, and hence different costs to serve. The overall profitability of a business is a function of the profitability of individual customers and customer groups.
Many businesses measure customer satisfaction but they…
Paul Naysmith
I greatly believe in training. I have been fortunate to work in businesses that also believed in having trained and qualified professionals in their organization. I have personally and professionally benefited from that philosophy, and I have gained new knowledge as a result.
Since graduating from…
Stewart Anderson
Often a firm is confronted with the key question of whether the quality of its products and services should be improved. For many readers, the question may even seem illogical: How could it not be beneficial for a firm to improve the quality of its products and services?
On closer analysis, however…
Donald J. Wheeler
Whenever we present capability indexes the almost inevitable follow-up question is, “What is the fraction nonconforming?” What this question usually means is, “Tell me what these capability indexes mean in terms that I can understand.” These questions have resulted in multiple approaches to…
Mike Richman
Last month I wrote an article entitled “Being Comfortable in a World of Never-Ending Change.” Editor in Chief Dirk Dusharme and I also covered this story on the April 29th edition of Quality Digest Live (QDL). QDL, by the way, is our live video show wrap-up of the week’s top industry news and…