Category Archives: Statistics

In Praise of Data-Driven Management (AKA “Why You Should be Skeptical of HiPPO’s”)

Posted on July 7, 2025 by Curiouscat

Guest post by Justin Hunter, originally published 18 August 2009. Jeff Fry recently linked to a fantastic webcast in Controlled Experiments To Test For Bugs In Our Mental Models. I would highly recommend it to anyone without any reservations. Ron Kohavi, of Microsoft Research does a superb job of using interesting real-world examples to explain the benefits of conducting small experiments with web site content and the advantages of making data-driven decisions. I firmly believe that the power of applied … Continue reading →

Posted in Data, Design of Experiments, IT, Management, Psychology, Quality tools, Software Development, Statistics | Tagged , , , ,

Remembering Brian Joiner

Posted on October 16, 2023 by John Hunter

I knew Brian Joiner as a child growing up in Madison, Wisconsin. He and my father worked together and our families spent time together. As I grew I interacted with Brian in my professional life and that relationship made my life better. We often saw things similarly. We could see things that we thought should improved and liked to focus on actually making improvements. Doing that is quite a bit more difficult than just pointing out all the problems that … Continue reading →

Posted in Data, Management, Statistics, Systems thinking | Tagged , , , , , , , | 1 Comment

Interview of Bill Hunter: Statistical Variability and Interactions

Posted on July 25, 2022 by John Hunter

Interview of Bill Hunter on Statistical Variability and Interactions by Peter Scholtes, 1986: In this interview Bill Hunter describes how results are made up of the impact and interactions of many variables. Many of those variables we don’t know about or account for. What we normally do is try to figure out the most important variables for processes and then experiment with those variables to find the best options given what we are trying to achieve. Often the description of … Continue reading →

Posted in Data, Management, Statistics, webcast | Tagged , , , , , , ,

Interview of Bill Hunter, Brian Joiner and Peter Scholtes on Better Management Practices

Posted on October 26, 2021 by John Hunter

Interview with Bill Hunter, Brian Joiner and Peter Scholtes (listen to the interview) on a Public Affair, National Public Radio about improving management practices in the USA. The interview is over 30 years old now but the better management ideas are as true today as they were then. Sadly we have not improved management practices based on these ideas very much. There have been improvements in how many organizations are managed but those improvements are so slow that fundamental problems … Continue reading →

Posted in Data, Deming, Management, Process improvement, Public Sector, Statistics, Systems thinking | Tagged , , , , , , , , , , ,

Poorly Stratified Data Leads to Mistakes in Analysis

Posted on April 18, 2018 by John Hunter

Stratification can help provide insight into the nature of the real world situation. Determining what is a sensible conclusion to draw and what is not is aided by an understanding of statistics and expert knowledge of the situation the data is drawn from. Continue reading →

Posted in Data, Management, Statistics, Systems thinking | Tagged , , , , , | 2 Comments

Don’t Expect Short Quotes to Tell the Whole Story

Posted on July 25, 2017 by John Hunter

When people try to use a short quote as an accurate encapsulation of a management concept they will often be disappointed. It is obvious that Dr. Deming believed that organizations failed to use data effectively to improve. He proposed that organizations needed to change and use data effectively in order to thrive over the long term. He believed that greatly increasing the use of data in decision making would be useful. He also believed there were specific problems with how … Continue reading →

Posted in Data, Management, quote, Statistics, Systems thinking | Tagged , , , , , | 4 Comments

Transforming a Management System – A Case Study From the Madison Wisconsin Police Department

Posted on March 10, 2015 by John Hunter

This post in an excerpt from The Quality Leadership Workbook for Police by Chief David Couper and Captain Sabine Lobitz (buy via Amazon). Transformational Steps A Case Study Madison, Wisconsin (1981-1993) Step 1: Educate and inform everyone in the organization about the vision, the goals, and Quality Leadership. This step must be passionately led by the top leader. Begin discussion with top management team and train them. Discuss and ask employees; get feedback from them. Share feedback with the chief … Continue reading →

Posted in Customer focus, Data, Deming, Management, Respect, Statistics | Tagged , , , , , , , , , , , , , , | 6 Comments

George Box Webcast on Statistical Design in Quality Improvement

Posted on June 11, 2014 by John Hunter

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 … Continue reading →

Posted in Creativity, Data, Innovation, Management, Process improvement, Psychology, Quality tools, Science, Statistics | Tagged , , , , , , , , , , , ,

Stu Hunter Discussing Bill Hunter, Statistics for Experimenters and EVOP

Posted on August 27, 2013 by John Hunter

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 … Continue reading →

Posted in Data, Statistics | Tagged , , , , , , , , , | 1 Comment

Design of Experiments: The Process of Discovery is Iterative

Posted on July 30, 2013 by John Hunter

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). [the video is no longer available online] In this example a screening experiment was done first to find those factors that have the largest impact on results. Once the most … Continue reading →

Posted in Design of Experiments, Management, Process improvement, Quality tools, Statistics | Tagged , , , , , , | 3 Comments

The Art of Discovery

Posted on April 18, 2013 by John Hunter

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 … Continue reading →

Posted in Creativity, Data, Innovation, Management, Process improvement, Quality tools, Science, Statistics | Tagged , , , , , , , , , , , , , | 4 Comments

Management Improvement Blog Carnival #190

Posted on April 4, 2013 by John Hunter

The Curious Cat Management Carnival is published twice each month. The posts selected for the carnival focus on the areas of management improvement I have focused on in the Curious Cat Management Improvement Guide since 1996: Deming, evidence based management, systems thinking, respect for people, applied statistics, etc.. photo of (from right to left) Peter Scholtes, John Hunter and George Box in Madison, Wisconsin at the 2008 Deming Conference George Box (1919 to 2013) by John Hunter – George Box … Continue reading →

Posted in Carnival, Management, Statistics | Tagged ,

George Box

Posted on March 28, 2013 by John Hunter

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 … Continue reading →

Posted in Data, Deming, Design of Experiments, Management, Manufacturing, Process improvement, Quality tools, quote, Respect, Six sigma, Statistics, Systems thinking, UK | Tagged , , , , , , , , , , , , , , | 15 Comments

Special Cause Signal Isn’t Proof A Special Cause Exists

Posted on October 3, 2012 by John Hunter

One of my pet peeves is when people say that a point outside the control limits is a special cause. It is not. It is an indication that it likely a special cause exists, and that special cause thinking is the correct strategy to use to seek improvement. But that doesn’t mean there definitely was a special cause – it could be a false signal. This post relies on an understand of control charts and common and special causes (review … Continue reading →

Posted in Data, Deming, Management, Manufacturing, Process improvement, Quality tools, quote, Six sigma, Statistics, Systems thinking | Tagged , , , , , , , , ,

Introductory Videos on Using Design of Experiments to Improve Results

Posted on June 18, 2012 by John Hunter

The video shows Stu Hunter discussing design of experiments in 1966. It might be a bit slow going at first but the full set of videos really does give you a quick overview of the many important aspects of design of experiments including factorial designed experiments, fractional factorial design, blocking and response surface design. It really is quite good, if you find the start too slow for you skip down to the second video and watch it. My guess is, … Continue reading →

Posted in Data, Design of Experiments, Science, Six sigma, Statistics | Tagged , , , , , , , , , | 6 Comments

2011 Management Blog Roundup: Stats Made Easy

Posted on January 8, 2012 by John Hunter

The 4th Annual Management blog roundup is coming to a close soon. This is my 3rd and final review post looking back at 2001, the previous two posts looked at: Gemba Panta Rei and the Lean Six Sigma Blog. I have special affinity for the use of statistics to understand and improve. I imaging it is both genetic and psychological. My father was a statistician and I have found memories of applying statistical thinking to understand a result or system. … Continue reading →

Posted in Carnival, Data, Six sigma, Statistics | Tagged , , ,