By: Stephen V. Thomas

The purpose of this article is to point out a problem when using percentages for subgroups over time, or for members in a larger group, where the size of the denominator varies and probabilities are being estimated. Also to introduce a solution: adjusted p-chart scores (APC), a new way to score or compute percentages (e.g., in the p-chart setting).

Thomas R. Cutler’s picture

By: Thomas R. Cutler

Dawn Keller’s picture

By: Dawn Keller

I really can’t make this stuff up.

I wrote a post a couple of years ago titled: “How to Talk to Your Kids About... Quality Improvement,” in which I lamented about Community Hero Day in my daughter’s first-grade class and the need to explain to her why I wasn’t at the “community-hero level” of classmate Maggie’s mommy, the pediatrician.

Mark Rosenthal’s picture

By: Mark Rosenthal

The title of this article is a search term that recently hit The Lean Thinker site. It’s an interesting question—and interesting that it gets asked.

Kaizen” is now an English word—it’s in the OED—and defined as such: “Noun. A Japanese business philosophy of continuous improvement of working practices, personal efficiency, etc. Origin. Japanese, literally ‘improvement.’”

Let’s talk a bit about that “Japanese, literally ‘improvement’” bit.

Thomas R. Cutler’s picture

By: Thomas R. Cutler

In November 2014, Quality Digest Daily published the first in a series about companywide lean cultures and how a lean journey affects people and companies. Jonesboro, Arkansas-based Hytrol Conveyors, a designer and manufacturer of advanced conveyor systems, allowed an in-depth examination of why lean manufacturing drives its entire culture. This is the second interview in the series.

Meredith Griffith’s picture

By: Meredith Griffith

During the last year or so I've heard a lot of people asking, "How can I calculate B10 life in Minitab?" Despite my being a statistician and an industrial engineer (mind you, one who's never actually been in the field) and having taken a reliability engineering course, I'd never heard of B10 life. So I did some research.

Walter Garvin’s picture

By: Walter Garvin

The foundation of lean manufacturing is kaizen, or continuous improvement. Although this principle usually targets manufacturing processes, it can also extend to the people who plan and implement lean projects—individuals that grow professionally and personally as a result of new skills and experiences they acquire by leading or participating in a project.

Danei Edelen’s picture

By: Danei Edelen

With multiple projects vying for your budgetary dollars, every purchase is scrutinized. With regards to statistical process control (SPC) software, companies view it primarily as a production efficiency tool, but they should expect more from their SPC software solution.

When evaluating SPC software, three critical areas must be considered:
1. Implementation time and return on investment (ROI)
2. Increase in production efficiency
3. Improvement in corporate profitability

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