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Gary Phillips
For decades now, the measurement systems analysis (MSA) approach has been the predominant method for evaluating measurement systems capability. Although this method is widely considered to be an acceptable and comprehensive approach throughout most of the world, a growing number of specialized…
Donald J. Wheeler
One of the common tools of quality assurance is acceptance sampling. Acceptance sampling uses the observed properties of a sample drawn from a lot or batch to make a decision about whether to accept or reject that lot or batch. While the textbooks are full of complex descriptions of various…
Joel Smith
In part 1, part 2, and part 3, we shared our blind wine-tasting experiment, the survey results, and the experimental results, respectively. To wrap things up, we’re going to see if the survey results tied to the experimental results in any meaningful way.
First, we look at whether self-identified…
Joel Smith
In part 1 of “Blind Wine,” we introduced our blind wine-tasting experimental setup, which included some survey questions asked ahead of time of each participant. In part 2 we looked at the results of that survey. Here we’ll examine how well the survey results align with the experimental results.…
Joel Smith
In part 1, we introduced our blind wine-tasting experimental setup, which included some survey questions asked ahead of time of each participant.
The four questions asked were: 1. On a scale of one to 10, how would you rate your knowledge of wine? 2. How much would you typically spend on a bottle…
Davis Balestracci
I was teaching a class and asked participants to create a control chart of an indicator that was important to them. A lab supervisor presented me with a chart on the number of procedures her department performed and told me that it wasn’t very useful.
She wanted to use the chart for staffing…
Joel Smith
Already relaxed on his first day in Napa, Brutus and his wife, Suzy, decide to visit their favorite winery just before lunch to taste its new Cabernet Sauvignon. The owner recognizes them as they walk in the door and seats them on the patio overlooking the vineyard. Two glasses appear, and as the…
David Schwinn
I recently noticed that Starbucks initiated a College Achievement Plan. Starbucks’ partners (employees) who pursue a college degree at Arizona State University (ASU) will receive some combination of tuition reimbursement, scholarships, and other financial aid from the company to help them graduate…
Carly Barry
The Six Sigma students at Rose-Hulman Institute of Technology are at it again! A few months back, we blogged about the Six Sigma project they did to reduce food waste at the on-campus dining center.
This time, the students—led by Dr. Diane Evans, Six Sigma black belt and associate professor of…
MIT Management Executive Education
Lean production, high -performance work systems, virtual communications, and collaboration applications are all examples of the latest tools, technology, and processes executives are encouraged to implement to improve productivity and efficiency. But why are there more useful tools and processes…
Abdallah Samaha
Lin Engineering is a California-based manufacturer of hybrid step motors that was founded in 1987 as a consulting company specializing in step-motor applications. Today, Lin Engineering is the largest manufacturer of 0.9-degree step motors in the motion control industry. As the quality and custom-…
Davis Balestracci
Author's note: To my non-U.S. readers, I apologize for using the sport of baseball to make my points today—and during the World Cup, no less! It’s a perfect context, however, and I hope you will be able to understand the main points.
In my last column, I talked about the different types of control…
Peter J. Sherman
Who says business luncheons are a waste of time? Recently, I enjoyed one of the most productive business luncheons of my career. In February, I was dining with two senior-level professionals at an IT staffing firm. After the usual chitchat about the recent snowstorms and traffic snarls, we started…
Donald J. Wheeler
One of the common tools of quality assurance is acceptance sampling. Acceptance sampling uses the observed properties of a sample drawn from a lot or batch to make a decision about whether to accept or reject that lot or batch. Textbooks are full of complex descriptions of various acceptance…
Patrick Runkel
You know what really gets on my nerves? A lot of things.
That slow, slinky way that cats walk by. Grrrr.
The rude, abrupt arrival of delivery persons in their obnoxiously loud trucks. (Why do they always pull up just as I'm settling down for a nap?) Grrrr.
Total strangers who reach…
Jay Arthur—The KnowWare Man
When looking at any existing process, people often have a hard time visualizing the enormous amount of delay, waste, and nonvalue-added work involved. That’s where a time value map comes in; it makes the invisible waste visible. A time value map shows value-added and nonvalue-added activities and…
Eston Martz
Remember The Little Engine That Could, the children’s story about self-confidence in the face of huge challenges? In it, a train engine keeps telling itself, “I think I can” while carrying a very heavy load up a big mountain. Next thing you know, the little engine has done it, but until that…
Donald J. Wheeler
One thing burned into the brains of those who survive a statistics class is that you have to specify an alpha-level before you do anything statistical. And when it comes to statistical inference, they are correct. But just what does the alpha-level represent? What does it mean in practice? Read on…
David Schwinn
This month’s column is about a recent trip to New York and what I learned along the way. About a month ago, we attended the National Band and Orchestra festival at Carnegie Hall. The high school orchestra our granddaughter, Claire, plays in was invited to participate, and we were not about to miss…
Davis Balestracci
My recent columns have emphasized the need for critical thinking to understand the process that produces any data. By just plotting data in their naturally occurring time order, many important questions arise about the data’s “pedigree” (a term coined by my respected colleagues Roger Hoerl and Ron…
Donald J. Wheeler
Who could ever be against having good measurements? Good measurements are like apple pie and motherhood. Since we all want good measurements, it sounds reasonable when people are told to check out the quality of their measurement system before doing an experiment or putting their data on a process…
Davis Balestracci
In my last column, I considered two of the most common questions faced by a statistical educator and the deeper questions that need to be addressed. I encouraged people to consider their everyday reality for the necessary context. Predictably, some become frustrated by my lack of concise answers…
Carly Barry
A few years ago I wrote about the difficulties that can ensue when you’re trying to get started on a lean Six Sigma or quality improvement initiative. What can be especially difficult is having many potential projects and you aren’t sure which one will give the most bang for your buck.
When it…
Mark R. Hamel
What do bus schedules have to do with a lean management system? Quite a bit, even though, obviously, the notion of a bus schedule is more metaphor (or is that analogy?) than reality.
Effective lean management systems are largely constituted by “mechanics” and lean leadership behaviors. The…
Taran March @ Quality Digest
Football is one of life’s mysteries for me. Despite a lifetime of passing television screens where blockish humanoids coalesce and separate against a green background, I can’t get past my shallow impression of huddle and muddle.
However, this has given me at least a rudimentary understanding of…