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Tom Pyzdek
Story update 3/29/2011: We corrected an error in the next to last sentence. "p < 0.05" was changed to "p > 0.05."
One of the exercises I assign to students in my training involves creating two histograms from normally distributed random numbers. The results often look similar to those shown…
Tom Pyzdek
Story update 3/29/2011: We corrected an error in the next to last sentence. "p < 0.05" was changed to "p > 0.05."
One of the exercises I assign to students in my training involves creating two histograms from normally distributed random numbers. The results often look similar to those shown…
Stewart Anderson
An excellent article by Donald Wheeler on the economic cost of quality, “What Is the Zone of Economic Production?” gave me pause to consider the strategic implications of reducing the costs associated with poor quality. As Wheeler pointed out in his article, there is an economic zone of production…
Stewart Anderson
An excellent article by Donald Wheeler on the economic cost of quality, “What Is the Zone of Economic Production?” gave me pause to consider the strategic implications of reducing the costs associated with poor quality. As Wheeler pointed out in his article, there is an economic zone of production…
Steve Moore
During the late 1990s, Marilyn vos Savant, holder of the Guinness Book of Records’ highest recorded IQ of 228, received an avalanche of hostile responses, many from Ph.D.s in math and statistics, when she correctly solved the controversial “Monty Hall Problem.” This concerns whether a contestant on…
Steve Moore
During the late 1990s, Marilyn vos Savant, holder of the Guinness Book of Records’ highest recorded IQ of 228, received an avalanche of hostile responses, many from Ph.D.s in math and statistics, when she correctly solved the controversial “Monty Hall Problem.” This concerns whether a contestant on…
Davis Balestracci
When teaching the I-chart, I’m barely done describing the technique (never mind teaching it) when, as if on cue, someone will ask, “When and how often should I recalculate my limits?” I’m at the point where this triggers an internal “fingernails on the blackboard” reaction. So, I smile and once…
William A. Levinson
Last May I wrote in “Airline Companies Are Driving Customers Away” that the U.S. Military Academy allows cadets only four responses to questions as to whether a specific duty or responsibility was carried out: “Yes, sir,” “No, sir,” “I don’t understand, sir,” and “No excuse, sir.” Col. Larry…
Joseph A. DeFeo
Designing for customer needs always leads to higher quality products and services, as well as innovative outcomes, because an effective design process uncovers hidden customer needs. Adapting the most effective models of continuous innovation can create the habit of innovation. Continuous…
Angelo Lyall
The business world seems fascinated with the story of how Toyota “invented” lean manufacturing. In actuality, Toyota did not aim to create this heavily marketed tool kit that we call lean manufacturing; the company simply did things “The Toyota Way” as they put it. Unleashing the innovative…
Miriam Boudreaux
There’s no more vicious cycle than problems that constantly reoccur because there’s no time to stop and solve them correctly. Although we all would like this cycle to stop, managers can’t afford to let employees waste time with too much researching, and employees don’t always have the time…
Steven Ouellette
“Come and listen to a story ‘bout a man named Ned / a poor Texas Sharpshooter barely kept his family fed. Then one day he was shootin’ at his barn / and he came up with a plan to spin a silly yarn. ‘Specifications,’ he said, ‘making of… the easy way.’ ” What do a Texas sharpshooter and…
Mark R. Hamel
A recent George F. Will column referenced the sign re-created to the right. Although I don’t necessarily believe that the signage encompasses the complete definition of discipline, it certainly provides food for thought.
A lot of folks think of discipline, especially in the context…
Kimber Evans
Kaizen. Across many industries in many countries, this term is thrown around as a “standard practice.” Continuous improvement—the ultimate goal of business everywhere, right? Find ways to get things done quicker, cheaper, more efficiently… and then implement those goals into an everyday routine.…
Jon Miller
There is an expression in Japanese, “Dust accumulates to form a mountain.” (Chiri mo tsumoreba yama to naru.) While this may not be geologically correct, it carries a deep truth that lean practitioners will recognize through experience. Taken positively, this is the essential spirit of kaizen…
I have long admired and respected Toyota. I have been to its factories, published and written books and articles about its revolutionary production system, known many of its brilliant people, and taught its methods to thousands of students. Like many of Toyota's admirers, I was shocked and saddened…
Steven Ouellette
With the announcement of another Toyota recall, it seems that everyone and their dog have an opinion about Toyota, and some of them might even be drawing the right conclusions. While everyone is allowed to have opinions (not the dogs—on quality matters I don't trust entities that consider cat poo a…
PQ Systems
In the world of continuous improvement, it might seem that one does not want to look back. After all, as systems improve, old data is no longer useful, and keeping it around—like keeping old love letters—may someday get you into trouble.
Knowing when to recalculate control limits is important, as…
Pierre Huot
If a manufacturer were to ask its clients how they evaluated goods or services, the three most common metrics would be goods at a fair price, on-time delivery, and quality. Ask which could be most valuable and in all likelihood the most significant response would be quality. When included in the…
Bill Hathaway
While eating my lunch at the park last fall, I looked down at the wooden deck below me, and noticed that an ant had picked up a large crumb from my sandwich. The crumb was heavy, and the ant labored to move it. Unfortunately, the gap between the deck planks was too wide for the ant to cross…
Donald J. Wheeler
Last month’s column looked at how to fix some of the Problems with Gauge R&R Studies. This month I will show you how to learn more from your gauge repeatability and reproducibility (R&R) data with less effort. Rather than getting lost in a series of computations, the "evaluating the…
Mark R. Hamel
My teenage education was (maybe) enhanced by substantial doses of Monty Python. Occasionally, I discover a lean metaphor somewhere within their body of work. One of my absolute favorite scenes is from the movie, Monty Python and the Holy Grail. The three-minute scene goes by two names: “The…
I was a 30-year-old quality project manager on a continuous metal processing line. We coated metal for a broad range of consumer and industrial products. Just like many metal-processing facilities, particularly back then, we used a bunch of processes involving chemistry of varying evilness for a…
Christopher Sirola
Many years ago, I was flipping through stations on the radio and came across a talk show. I don’t remember the topic of discussion, but something the host said stuck with me.
“Scientists,” the host blustered (and I paraphrase), “are 95-percent confident of these results! Wow!”
The sound you’re now…
William A. Levinson
Six Sigma has been credited with six- or even seven-figure returns in single projects, but it has not kept the manufacturing jobs of its principal exponents—Motorola, General Electric, and Maytag—in the United States. Henry Ford, on the other hand, proved that lean manufacturing can make almost any…