Tag Archives: George Box

Who Inspires Your Management Thinking and Action?

This month Bill Troy, ASQ CEO, asked ASQ Influential Voices bloggers: “who influenced or inspired your management thinking and in what ways?” He discussed Paul O’Neill’s influence on his thinking; I agree that Paul has done some very impressive work in health care.

I have written about my management influences in the past: Active Management Improvement Leaders (2006) and Who Influences Your Thinking? (2005).

John and Bill Hunter Bill Hunter and John Hunter

My largest influence by far is my father, William Hunter. Here is a good example of why: Managing Our Way to Economic Success, Two Untapped Resources: potential information and employee creativity. In another post I also wrote about my early influences related to quality management as I grew up in Madison, Wisconsin.

From an early age I learned to experiment, appreciate and understand data, respect people and continually improve. These lessons were a natural part of growing up in our family.

Another influence, and natural part of growing up in our family was George Box. He was Dad’s colleague and shared all the qualities listed above; we often saw him at our house or visited their family at George’s house.

They both shared the expectation that you continually seek to learn and improve. They both shared the scientist and engineering mindset that ideas should be tested and probed and new methods and ideas discovered. They also believed that making improvements in the real world was the goal. The aim was not merely to think up new ideas but to implement them to improve people’s lives. They shared a passion for freeing the minds of everyone to allow everyone to have joy in work and life.

Brian Joiner was also around as I grew up and to a lessor extent so was Peter Scholtes. After I graduated from college and started to work I actually worked with Peter actually more than the others (I created and still maintain Peter’s website) and he had a great influence on my management thinking. Again all that I said about George and Dad applies to Peter. Peter was less focused than the statisticians (the other 3 and Deming were statisticians) on data, but they were all cut from the same cloth.

And through all of them I was exposed to Dr. Deming’s ideas and those also have had a great influence on my thinking. As you can see from the characteristics listed above that it all fits together very well, which isn’t a surprise. The reason Dad, Brian, Peter, George and Deming worked with each other and shared ideas was that the ideas they all were pursuing fit together. Dad was writing back and forth with Deming all the way back in the 1960’s and continued until he died. In Out of the Crisis, Deming asked Dad to write a few pages on the work with the City of Madison applying the management improvement ideas.

Dad had decided he wanted to help the City after returning from a summer lecturing in China on design of experiments (mainly). He worked with Peter Scholtes (at that time a City employee) on the project with the City of Madison’s vehicle maintenance garage. The Mayor, Joe Sensenbrenner, wrote up those experiences in the Harvard Business Review (Quality Comes to City Hall). Peter then went to work for Joiner Associates and soon he and Brian were working with Deming, speaking at his 2 day seminars.

Brian had previously worked at the UW-Madison Statistics department that George established. Dad followed George from Princeton, where as a under-graduate student he took a graduate course George taught. Dad was the first PhD graduate of the department and became a professor the next year.

Continue reading

George Box Webcast on Statistical Design in Quality Improvement

George Box lecture on Statistical Design in Quality Improvement at the Second International Tampere Conference in Statistics, University of Tampere, Finland (1987).

Early on he shows a graph showing the problems with American cars steady over a 10 years period. Then he overlays the results for Japanese cars which show a steady and significant decline of the same period.

Those who didn’t get to see presentations before power point also get a chance to see old school, hand drawn, overhead slides.

He discusses how to improve the pace of improvement. To start with informative events (events we can learn from) have to be brought to the attention of informed observers. Otherwise only when those events happen to catch the attention of the right observer will we capture knowledge we can use to improve. This results in slow improvement.

A control chart is an example of highlighting that something worth studying happened. The chart will indicate when to pay attention. And we can then improve the pace of improvement.

Next we want to encourage directed experimentation. We intentionally induce informative events and pay close attention while doing so in order to learn.

Every process generates information that can be used to improve it.

He emphasis the point that this isn’t about only manufacturing but it true of any process (drafting, invoicing, computer service, checking into a hospital, booking an airline ticket etc.).

He then discussed an example from a class my father taught and where the students all when to a TV plant outside Chicago to visit. The plant had been run by Motorola. It was sold to a Japanese company that found there was a 146% defect rate (which meant most TVs were taken off the line to be fixed at least once and many twice) – this is just the defect rate before then even get off the line. After 5 years the same plant, with the same American workers but a Japanese management system had reduced the defect rate to 2%. Everyone, including managers, were from the USA they were just using quality improvement methods. We may forget now, but one of the many objections managers gave for why quality improvement wouldn’t work in their company was due to their bad workers (it might work in Japan but not here).

He references how Deming’s 14 points will get management to allow quality improvement to be done by the workforce. Because without management support quality improvement processes can’t be used.

With experimentation we are looking to find clues for what to experiment with next. Experimentation is an iterative process. This is very much the mindset of fast iteration and minimal viable product (say minimal viable experimentation as voiced in 1987).

There is great value in creating iterative processes with fast feedback to those attempting to design and improve. Box and Deming (with rapid turns of the PDSA cycle) and others promoted this 20, 30 and 40 years ago and now we get the same ideas tweaked for startups. The lean startup stuff is as closely related to Box’s ideas of experimentation as an iterative process as it is to anything else.

Related: Ishikawa’s seven quality control tools

He also provided a bit of history that I was not aware of saying the first application of orthogonal arrays (fractional factorial designs) in industry was by Tippett in 1933. And he then mentioned work by Finney in 1945, Plackett and Burman in 1946 and Rao in 1947.

George Box Articles Available for a Short Time

A collection of George Box articles have been selected for a virtual George Box issue by David M. Steinberg and made available online.

George E. P. Box died in March 2013. He was a remarkably creative scientist and his celebrated professional career in statistics was always at the interface of science and statistics. George Box, J. Stuart Hunter and Cuthbert Daniel were instrumental in launching Technometrics in 1959, with Stu Hunter as the initial editor. Many of his articles were published in the journal. Therefore we think it is especially fitting that Technometrics should host this on-line collection with some of his most memorable and influential articles.

They also include articles from Journal of the American Statistical Association and Quality Engineering. Taylor & Francis is offering these articles freely in honor of George Box until December 31st, 2014. It is very sad that closed science and engineering journals block access to the great work created by scientists and engineers and most often paid for by government (while working for state government universities and with grants organizations like the National Science Foundation[NSF]). At least they are making a minor exception to provide the public (that should be unlimited access to these works) a limited access to these articles this year. These scientists and engineers dedicated their careers to using knowledge to improve society not to hide knowledge from society.

Some of the excellent articles make available for a short time:

The “virtual issue” includes many more articles.

Related: Design of Experiments: The Process of Discovery is IterativeQuotes by George E.P. BoxThe Art of DiscoveryAn Accidental Statistician: The Life and Memories of George E. P. Box

Continue reading

Stu Hunter Discussing Bill Hunter, Statistics for Experimenters and EVOP

In this clip, Stu Hunter talks about Bill Hunter (my father, and no relation to Stu Hunter), Statistics for Experimenters and EVolutionary OPerations (EVOP).

Stu mentions Bill Hunter’s work with the City of Madison, which started with the First Street Garage (Out of the Crisis included a short write up on this effort by Dad, which, I believe, was the first application of Deming’s ideas in the public sector).

There was also a great deal of work done with the Police department, as the police chief, David Couper, saw great value in Deming’s ideas. The Police department did some great work and David’s blog shares wonderful ideas on improving policing. I don’t think Dad was that directly involved in what happened there, but it is one of the nice benefits of seeding new ideas: as they take root and grow wonderful things happen without any effort on your part.

As to why Dad got involved with the city, he returned from a summer teaching design of experiments and quality improvement methods in China (this is just before China was really open, a few outsiders were let in to teach). We had also lived overseas several other times, always returning to Madison. He decided he wanted to contribute to the city he loved, Madison, and so he talked to the Mayor about helping improve performance of the city.

The mayor listened and they started with a pilot project which Dad work on with Peter Scholtes. Dad talked to Peter, who he had know for years, and who worked for the city, before talking to the mayor. Read more about the efforts in Madison via the links at the end of this post.

Continue reading

Design of Experiments: The Process of Discovery is Iterative

This video is another excerpt on the design of experiments videos by George Box, see previous posts: Introduction to Fractional Factorial Designed Experiments and The Art of Discovery. This video looks at learning about experimental design using paper helicopters (the paper linked there may be of interest to you also).

In this example a screening experiment was done first to find those factors that have the largest impact on results. Once the most important factors are determined more care can be put into studying those factors in greater detail.

The video was posted by Wiley (with the permission of George’s family), Wiley is the publisher of George’s recent autobiography, An Accidental Statistician, and many of his other books.

The importance of keeping the scope (in dollars and time) of initial experiments down was emphasized in the video.

George Box: “Always remember the process of discovery is iterative. The results of each stage of investigation generating new questions to answered during the next.”

Soren Bisgaard and Conrad Fung also appear in this except of the video.

The end of the video includes several suggested resources including: Statistics for Experimenters, Out of the Crisis and The Scientific Context of Quality Improvement.

Related: Introductory Videos on Using Design of Experiments to Improve Results (with Stu Hunter)Why Use Designed Factorial Experiments?brainstormingWhat Can You Find Out From 12 Experimental Runs?

The Art of Discovery

Quality and The Art of Discovery by Professor George Box (1990):

Quotes by George Box in the video:

“I think of statistical methods as the use of science to make sense of numbers”

“The scientific method is how we increase the rate at which we find things out.”

“I think the quality revolution is nothing more, or less, than the dramatic expansion of the of scientific problem solving using informed observation and directed experimentation to find out more about the process, the product and the customer.”

“It really amounts to this, if you know more about what it is you are doing then you can do it better and you can do it cheaper.”

“We are talking about involving the whole workforce in the use of the scientific method and retraining our engineers and scientists in a more efficient way to run experiments.”

“Tapping into resources:

  1. Every operating system generates information that can be used to improve it.
  2. Everyone has creativity.
  3. Designed experiments can greatly increase the efficiency of experimentation.

An informed observer and directed experimentation are necessary for the scientific method to be applied. He notes that the control chart is used to notify an informed observer to explain what is special about the conditions when a result falls outside the control limits. When the chart indicates a special cause is likely present (something not part of the normal system) an informed observer should think about what special cause could lead to the result that was measured. And it is important this is done quickly as the ability of the knowledgable observer to determine what is special is much greater the closer in time to the result was created.

The video was posted by Wiley (with the permission of George’s family), Wiley is the publisher of George’s recent autobiography, An Accidental Statistician: The Life and Memories of George E. P. Box, and many of his other books.

Related: Two resources, largely untapped in American organizations, are potential information and employee creativityStatistics for Experimenters (book on directed experimentation by Box, Hunter and Hunter)Highlights from 2009 George Box SpeechIntroductory Videos on Using Design of Experiments to Improve Results (with Stu Hunter)

George Box

I would most likely not exist if it were not for George Box. My father took a course from George while my father was a student at Princeton. George agreed to start the Statistics Department at the University of Wisconsin – Madison, and my father followed him to Madison, to be the first PhD student. Dad graduated, and the next year was a professor there, where he and George remained for the rest of their careers.

George died today, he was born in 1919. He recently completed An Accidental Statistician: The Life and Memories of George E. P. Box which is an excellent book that captures his great ability to tell stories. It is a wonderful read for anyone interested in statistics and management improvement or just great stories of an interesting life.

photo of George EP Box

George Box by Brent Nicastro.

George Box was a fantastic statistician. I am not the person to judge, but from what I have read one of the handful of most important applied statisticians of the last 100 years. His contributions are enormous. Several well know statistical methods are known by his name, including:

George was elected a member of the American Academy of Arts and Sciences in 1974 and a Fellow of the Royal Society in 1979. He also served as president of the American Statistics Association in 1978. George is also an honorary member of ASQ.

George was a very kind, caring and fun person. He was a gifted storyteller and writer. He had the ability to present ideas so they were easy to comprehend and appreciate. While his writing was great, seeing him in person added so much more. Growing up I was able to enjoy his stories often, at our house or his. The last time I was in Madison, my brother and I visited with him and again listened to his marvelous stories about Carl Pearson, Ronald Fisher and so much more. He was one those special people that made you very happy whenever you were near him.

George Box, Stuart Hunter and Bill Hunter (my father) wrote what has become a classic text for experimenters in scientific and business circles, Statistics for Experimenters. I am biased but I think this is acknowledged as one of (if not the) most important books on design of experiments.

George also wrote other classic books: Time series analysis: Forecasting and control (1979, with Gwilym Jenkins) and Bayesian inference in statistical analysis. (1973, with George C. Tiao).

George Box and Bill Hunter co-founded the Center for Quality and Productivity Improvement at the University of Wisconsin-Madison in 1984. The Center develops, advances and communicates quality improvement methods and ideas.

The Box Medal for Outstanding Contributions to Industrial Statistics recognizes development and the application of statistical methods in European business and industry in his honor.

All models are wrong but some are useful” is likely his most famous quote. More quotes By George Box

A few selected articles and reports by George Box

Continue reading

Highlights from Recent George Box Speech

The JMP blog has posted some highlights from George Box’s presentation at Discovery 2009

Infusing his entire presentation with humor and fascinating tales of his memories, Box focused on sequential design of experiments. He attributed much of what he knows about DOE [design of experiments] to Ronald A. Fisher. Box explained that Fisher couldn’t find the things he was looking for in his data, “and he was right. Even if he had had the fastest available computer, he’d still be right,” said Box. Therefore, Fisher figured out how to study a number of factors at one time. And so, the beginnings of DOE.

Having worked and studied with many other famous statisticians and analytic thinkers, Box did not hesitate to share his characterizations of them. He told a story about Dr. Bill Hunter and how he required his students to run an experiment. Apparently a variety of subjects was studied [see 101 Ways to Design an Experiment, or Some Ideas About Teaching Design of Experiments]

According to Box, the difficulty of getting DOE to take root lies in the fact that these mathematicians “can’t really get the fact that it’s not about proving a theorem, it’s about being curious about things. There aren’t enough people who will apply [DOE] as a way of finding things out. But maybe with JMP, things will change that way.”

George Box is a great mind and great person who I have had the privilege of knowing my whole life. My father took his class at Princeton, then followed George to the University of Wisconsin-Madison (where Dr. Box founded the statistics department and Dad received the first PhD). They worked together building the UW statistics department, writing Statistics for Experimenters and founding the Center for Quality and Productivity Improvement among many other things.

Statistics for Experimenters: Design, Innovation, and Discovery shows that the goal of design of experiments is to learn and refine your experiment based on the knowledge you gain and experiment again. It is a process of discovery. If done properly it is very similar to the PDSA cycle with the application of statistical tools to aid in determining the impact of various factors under study.

Related: Box on QualityGeorge Box Quotationsposts on design of experimentsUsing Design of Experiments

Management Blog Posts From January 2006

photo of John Hunter John Hunter on the top of the Bear’s Hump trail in the park, Waterton, Canada. A great, very steep trail.
  • Agility vs. Six Sigma – “Process improvement should be part of a well run system, as should innovation. Deming, who many believe focused only process improvement, knew the importance of both. See several of Deming’s ideas on innovation.”
  • The Public Sector and Deming – Madison’s quality improvement efforts began after then-Mayor James F. Sensenbrenner and his staff were exposed to the teaching of W. Edwards Deming in 1983. and a follow up Public Management II: Actually Deming did acknowledge that the United States government was not designed to be as efficient as possible. From page 198 of Out of the Crisis “Government service is to be judged on equity as well as on efficiency.” He then quotes Oscar Ornati “We have forgotten that the function of government is more equity oriented than efficiency oriented.”
  • How Not to Convert Equity – “In no way does increasing their leverage convert equity that might melt away… If the value of their house fell $300,000 before or after this supposed ‘conversion’ they would ‘lose’ (on paper) the same amount: $300,000.”
  • Management Improvement LeadersRussell Ackoff – frankly I find it difficult to imagine a list management thought leader list, not including his name. Organizational development, systems thinking, management improvement, planning, policy deployment, learning. George Box: statistics, design of experiments, finding solutions (problem solving, process improvement), learning, management improvement…
  • The photo shows me from one of my most enjoyable days from 2005 hiking in Glacier Waterton International Peace Park

Statistics for Experimenters in Spanish

book cover of Estadística para Investigadores

Statistics for Experimenters, second edition, by George E. P. Box, J. Stuart Hunter and William G. Hunter (my father) is now available in Spanish.

Read a bit more can find a bit more on the Spanish edition, in Spanish. Estadística para Investigadores Diseño, innovación y descubrimiento Segunda edición.

Statistics for Experimenters – Second Edition:

Catalyzing innovation, problem solving, and discovery, the Second Edition provides experimenters with the scientific and statistical tools needed to maximize the knowledge gained from research data, illustrating how these tools may best be utilized during all stages of the investigative process. The authors’ practical approach starts with a problem that needs to be solved and then examines the appropriate statistical methods of design and analysis.

* Graphical Analysis of Variance
* Computer Analysis of Complex Designs
* Simplification by transformation
* Hands-on experimentation using Response Service Methods
* Further development of robust product and process design using split plot arrangements and minimization of error transmission
* Introduction to Process Control, Forecasting and Time Series

Book available via Editorial Reverte

Related: Statistics for Experimenters ReviewCorrelation is Not CausationStatistics for Experimenters Dataposts on design of experiments

Does the Data Deluge Make the Scientific Method Obsolete?

The End of Theory: The Data Deluge Makes the Scientific Method Obsolete by Chris Anderson

“All models are wrong, but some are useful.”

So proclaimed statistician George Box 30 years ago, and he was right. But what choice did we have? Only models, from cosmological equations to theories of human behavior, seemed to be able to consistently, if imperfectly, explain the world around us. Until now. Today companies like Google, which have grown up in an era of massively abundant data, don’t have to settle for wrong models. Indeed, they don’t have to settle for models at all.

Speaking at the O’Reilly Emerging Technology Conference this past March, Peter Norvig, Google’s research director, offered an update to George Box’s maxim: “All models are wrong, and increasingly you can succeed without them.”

There is now a better way. Petabytes allow us to say: “Correlation is enough.” We can stop looking for models. We can analyze the data without hypotheses about what it might show. We can throw the numbers into the biggest computing clusters the world has ever seen and let statistical algorithms find patterns where science cannot.

see update, below. Norvig was misquoted, he agrees with Box’s maxim

I must say I am not at all convinced that a new method without theory ready to supplant the existing scientific method. Now I can’t find peter Norvig’s exact words online (come on Google – organize all the world’s information for me please). If he said that using massive stores of data to make discoveries in new ways radically changing how we can learn and create useful systems, that I believe. I do enjoy the idea of trying radical new ways of viewing what is possible.

Practice Makes Perfect: How Billions of Examples Lead to Better Models (summary of his talk on the conference web site):

In this talk we will see that a computer might not learn in the same way that a person does, but it can use massive amounts of data to perform selected tasks very well. We will see that a computer can correct spelling mistakes, translate from Arabic to English, and recognize celebrity faces about as well as an average human—and can do it all by learning from examples rather than by relying on programming.

Related: Will the Data Deluge Makes the Scientific Method Obsolete?Pragmatism and Management KnowledgeData Based Decision Making at GoogleSeeing Patterns Where None ExistsManage what you can’t measureData Based BlatheringUnderstanding DataWebcast on Google Innovation
Continue reading

All Models Are Wrong But Some Are Useful

“All Models Are Wrong But Some Are Useful” -George Box

A great quote. Here is the source: George E.P. Box, Robustness in the strategy of scientific model building, page 202 of Robustness in Statistics, R.L. Launer and G.N. Wilkinson, Editors. 1979.

Related: Dangers of Forgetting the Proxy Nature of Dataarticles by George BoxQuotes by Dr. W. Edwards Deming

Management Blog Tag

John and Bill Hunter

I have been tagged by Mark Graban of the lean blog: “Tag” – 5 Things You Don’t Know About Me.

      • I spent a year in Singapore and another in Nigeria while I was growing up.
      • Dad, Bill Hunter, was a professor (related to the item above), who co-authored Statistics for Experimenters and applied Deming’s ideas in the Public Sector for the first time. Out of the Crisis pages 245-247 include a write up on that effort with the First Street Garage. Peter Scholtes, at the time worked for the City of Madison, and played a big part in the effort. He went on to write the Team Handbook and The Leader’s Handbook.
      • I was on the Wisconsin Badger Basketball camp championship teams in 7th and 8th grade. The second year we played the championship game on the regular Badger Basketball home court. The Badger’s are a bit better now then they were then.
      • I have flown on “Air Force One.” Not technically, since it the president was not aboard, but while working for the White House Military Office I flew on the plane on a couple test flights. It is officially “Air Force One” only when the President is flying.
      • I spent many Thanksgivings beating John Dower, my father (and other of the family members of both) at Oh Hell. Some might claim I remember more victories today than took place at the time.

John Hunter. The small person is me, the bigger one is Dad.

I tag: Kathleen Fasanella, Mike Wroblewski, Peter Abilla, Karen Wilhelm and John Dowd.

More on Madison’s Quality efforts: Doing More With Less in the Public Sector: A Progress Report from Madison, WisconsinQuality in the Community: One City’s Experience

Box on Quality

Bill Hunter and George Box

Dr. George Box is not as well known in the general management community as his ideas merit (in my biased opinion – photo of Bill Hunter and George Box). He is well know in the statistics field as one of the leading statistical minds. Box on Quality is an excellent book that gathers his essays from his 65th to 80th year. The book has just been issued in paperback (which helps as the hardback was pricey).

While some of the essays are aimed at a reader with an advanced understanding of statistics, many of the articles are aimed at any manager attempting to apply Quality Management principles (SPC, Deming, process improvement, six sigma, etc.). An except from the book provides a table of contents and an introduction.

Some of the articles from the book are available online. I encourage you to take a look at several of the articles and then go ahead and add this book to your prized management resources, if you find them worthwhile.

Who Influences Your Thinking?

Comments on Who Influences Your Thinking?Survey results

> 1. Are people getting most of their information
> from other sources?
That would be my guess.

Similar to the phenomenon of “the long tail” which is an interesting topic in its own right. We tend to focus on the popular few (books, musicians, movies, authors, computer programs…) but often the sum of the less popular many is more significant. See:

  • The Long Tail, by Chris Anderson, Wired, Oct 2004 “The average Barnes & Noble carries 130,000 titles. Yet more than half of Amazon’s book sales come from outside its top 130,000 titles. Consider the implication: If the Amazon statistics are any guide, the market for books that are not even sold in the average bookstore is larger than the market for those that are”
  • Continued discussion of the Amazon figures in a Chiris Anderson’s blog. “I’ve now spoken to Jeff Bezos (and others) about this. He doesn’t have a hard figure for the percentage of sales of products not available offline, but reckons that it’s closer to 25-30%.”
  • The long tail – a secret sauce for companies like Amazon.com, Netflix and Apple Computer, Motley Fool, NPR Audio Recording

Getting back to the question raised by the “Who Influences Your Thinking” post; More importantly I believe they (we) are just failing to get all we should.
Continue reading

Statistics for Experimenters – Second Edition

Buy Statistics for Experimenters

The classic Statistics for Experimenters has been updated by George Box and Stu Hunter, two of the three original authors. Bill Hunter, who was my father, and the other author, died in 1986. Order online: Statistics for Experimenters: Design, Innovation, and Discovery , 2nd Edition by George E. P. Box, J. Stuart Hunter, William G. Hunter.
I happen to agree with those who call this book a classic, however, I am obviously biased.

Google Scholar citations for the first edition of Statistics for Experimenters.
Citations in Cite Seer to the first edition.

The first edition includes the text of Experiment by Cole Porter. In 1978 finding a recording of this song was next to impossible. Now Experiment can be heard on the De-Lovely soundtrack.

Text from the publisher on the 2nd Edition:
Rewritten and updated, this new edition of Statistics for Experimenters adopts the same approaches as the landmark First Edition by teaching with examples, readily understood graphics, and the appropriate use of computers. Catalyzing innovation, problem solving, and discovery, the Second Edition provides experimenters with the scientific and statistical tools needed to maximize the knowledge gained from research data, illustrating how these tools may best be utilized during all stages of the investigative process. The authors’ practical approach starts with a problem that needs to be solved and then examines the appropriate statistical methods of design and analysis.
Continue reading

Management Improvement History

Originally posted to the Deming Electronic Network, 22 Sep 1999, in response to this message (link removed because it was broken).

I would like to say that I think it is good that we have disagreements on the DEN. I think it is a strength of the DEN, not a weakness. However, I think we sometimes get to personal with no real purpose. One example of this, for me, is: “Well, I guess we knew different Demings. Mine was a teacher named Dr. W. Edwards Deming.” I doubt this statement is meant to be taken literally, and if it is not I do not see what it adds to the discussion. I point this out not because I think this is some bad act that should be punished but that I think we need to continue to develop a sense of how we wish to express our disagreements and I think that we should try to do so more constructively.

For the past 60 years we’ve been looking for the magic bullet that will improve the quality of our products, services and lives. In the 1940s, we applied statistics through sampling, SPC and design of experiments to improve our products. In the 1950s, we used quality cost and total quality control to bring about quality improvement. In the 1960s, zero defects and MIL-Q-9858A drove the quality improvement process. In the 1970s, quality circles, process qualification and supplier qualification became key quality issues. In the 1980s, employee training in problem solving, team activities and just-in-time inventory were the things to do.”

I find this statement so far from the truth that it would seriously damage any PDSA with this as an accepted assessment of history. I do not believe Deming had such an inaccurate view (of course I may be wrong). I do believe we need to improve our practice of Quality (and to do that we need to understand what happened in the past and why it was not more successful). The idea that Design of Experiments (DoE) was at the core of some Quality Movement to me is not at all accurate.

Continue reading