All Features
Ken Levine
How do you determine the “worst case” scenario for a process? Is it by assuming the worst case for each process task or step? No. The reason is that the probability of every step having its worst case at the same time is practically zero. What we’re looking for is a value that will occur a very…
Harish Jose
In this article I want to look at the concept of equifinality in relation to the plan-do-check-act (PDCA) cycle. In systems theory, equifinality is defined as reaching the same end, no matter what the starting point was. This is applicable only in an open system, one that interacts with its…
Bruce Hamilton
Twice in the last month I’ve heard the phrase “traditional lean” used in public presentations. In neither case did the presenter explain the expression, but one displayed a slide with a Venn diagram showing the overlap between lean and Six Sigma.
I suppose this means that he defined traditional…
Quality Transformation With David Schwinn
The map is not the territory.
—Alfred Korzybski
This column is a tribute primarily to Jamshid Gharajedaghi, a long-time teacher, mentor, colleague, and friend. My wife Carole and I recently visited him while in Philadelphia doing a presentation for the International Society for Performance…
Jim Benson
We are all cursed with “surprises” at work. We come in, sit down, get ready for the day. We select a task to start on, and about halfway through, it explodes on us. The seemingly simple task now has 30 subtasks all lined up, ready to destroy our day.
This is stressful. Since we’re likely already…
Fred Schenkelberg
What if all failures occurred truly randomly? Well, for one thing the math would be easier.
The exponential distribution would be the only time to failure distribution—we wouldn’t need Weibull or other complex multi-parameter models. Knowing the failure rate for an hour would be all we would need…
Bruno Scibilia
In yesterday’s column, I discussed how a DOE was chosen to optimize a chemical-mechanical polishing process in the microelectronics industry. This important process improved the plant’s final manufacturing yields. We selected an experimental design that let us study the effects of six process…
Ken Levine
One poorly understood concept in lean Six Sigma is how much to “stretch” when setting S.M.A.R.T. goals. These letters are defined as S—specific; M—measureable; A—assignable, attainable, or achievable; R—realistic, reasonable, or relevant; and T—time-based or time-bound. Regardless of the different…
Kimberly Watson-Hemphill, Kristine Nissen Bradley
Editor’s note: This is an excerpt from the new book, Innovating Lean Six Sigma, by Kimberly Watson-Hemphill and Kristine Nissen Bradley.
Like every company, healthcare businesses do their work through processes, and any process can be studied and improved using basic lean Six Sigma methods. Figure…
Davis Balestracci
April Fool’s Day (today) and the opening of baseball season (this Sunday) are upon us. To mark the first event, I’ll let my distinguished colleague Donald Wheeler make some eloquent and crucial statistical points that turn out to be, well, laughably simple. (No fooling!) Regarding the baseball…
Matthew Barsalou
The start of a failure investigation may involve brainstorming, but empirical methods will be required to actually identify a problem's cause. Implementing an improvement action without a confirmed root cause risks a reoccurrence of the issue because the true root cause has yet to be addressed.…
Eston Martz
There’s plenty of noisy disagreement about the state of healthcare, but when you look beyond the controversies, a great deal of common ground exists.
Many agree that the way we’ve been doing things is wasteful and inefficient, when healthcare should be delivered as efficiently and effectively as…
John Flaig
Sometimes when authors try to make a technical concept more understandable, it’s simplified but unfortunately, less accurate.
For example, when the developers of Six Sigma wanted to explain control charts and process capability analysis, they needed to include how the signal can be separated from…
Beth Savage
Out-of-control gas prices reported in the news have our attention. Nearly every media outlet, from the small-town daily news to The Wall Street Journal, has a gas price story on a weekly basis: “Gas Prices Are Plunging,” and “How Low Will Gas Prices Go?” It’s news when they rise and news when they…
Davis Balestracci
This article is based on some ideas from my respected colleague Mark Hamel. Despite the lean framework, these ideas apply to any improvement approach—all of which come from the same theory, lean included.
During the past 35 years, quality has evolved from the necessary evil of quality control to…
Mike Micklewright
In October 2014, 17-year-old Laquan McDonald was shot 16 times by a Chicago police officer. In November 2015, footage of the shooting was released and has been viewed all over the world. The footage shows an aggressive attack by a police officer, a supposed person of service to the community, as…
Davis Balestracci
Marketers are relentless in their efforts to seduce you with fancy tools, acronyms, Japanese terminology—and promises—about their versions of formal improvement structures such as Six Sigma, lean, lean Six Sigma, or the Toyota Production System, each with its own unique toolbox.
In my last column…
Quality Transformation With David Schwinn
Wherever you stand, be the Soul of that place. —Rumi
I was blessed last week to spend two glorious days with my wife, Carole, our daughter, Lisa, and Lisa’s consulting partner, Rox. Those two days were a model for how we could be in every one of our workplaces... and the world would be a better…
Quality Transformation With David Schwinn
I teach management and leadership. Recently, the topic in one of my classes was change and stress. I asked my students, who are nearly all employed and range in age from 19 to 55, what caused them the greatest stress in the workplace. Among the various responses were several related to how they…
Steve Daum
In daily conversations, I field questions from plant managers, quality managers, engineers, supervisors, and plant production workers about the challenges of applying statistical process control (SPC) methods. Following are the five most prevalent and costly mistakes I witness in the application…
William A. Levinson
The Shewhart control chart is relatively insensitive to non-normal distributions, and the worst foreseeable consequences of a wrong decision involve searching for an assignable or special cause when none is present. The economic consequences depend on the time wasted, and whether unnecessary…
Quality Transformation With David Schwinn
This month’s column results from my wife, Carole, asking me to “watch this.” This was a short video on her computer showing two young children brilliantly and inspirationally singing, “You Raise Me Up.” I was dumbstruck. Their song immediately took me to many places. I was reminded of the wisdom…
Patrick Runkel
Did you ever wonder why statistical analyses and concepts often have such weird, cryptic names? One conspiracy theory points to the workings of a secret committee called the International Committee for Sadistic Statistical Nomenclature and Numerophobia (ICSSNN), which was formed solely to befuddle…
Bill Kalmar
My wife Mary has an obsession—she always checks the expiration and freshness dates on food products that we purchase. Mary also marks purchase dates on products such as ketchup, mustard, and salad dressings when she places these items in our refrigerator. I think she has an expiration date on me…
George Chemers, Patricia Cronin
Although information is readily available about applying team-building techniques to Six Sigma projects, there’s not much about how learning styles affect the success of Six Sigma teams. Knowing that the “people side” of an otherwise technical and statistical-based methodology is important to a…
