Statistics Features

Donald J. Wheeler's picture
Donald J. Wheeler
This article tracks the progression of Covid-19 over the past six months on a state-by-state basis and provides a framework for interpreting these curves by including curves for seven other countries...
Donald J. Wheeler's picture
Donald J. Wheeler
In past articles I have used graphs to provide perspective on how the Covid-19 pandemic is progressing around the world. In this article I shall update some of those graphs and use these historical...
Betsy Mason's picture
Betsy Mason
  This story was originally published by Knowable Magazine. Imagine a science textbook without images. No charts, no graphs, no illustrations or diagrams with arrows and labels. The science...
Donald J. Wheeler's picture
Donald J. Wheeler
Since the start of the Covid pandemic I have received many questions about how to analyze the Covid numbers using process behavior charts. Various schemes have been proposed and used. This column...
Donald J. Wheeler's picture
Donald J. Wheeler
With data that come along one number at a time, it is easy to get lost in the details. To see the big picture, it helps to use a time-series graph that will draw your eye in the direction that your...
Paul Laughlin's picture
Paul Laughlin
This month I read Andy Kirk’s absorbing Data Visualisation 2, or to give it its proper title Data Visualisation 2nd Edition. The subtitle for this book is A Handbook for Data-Driven Design, which...
Ryan Ayers's picture
Ryan Ayers
Data are valuable assets, so much so that they are the world’s most valuable resource. That makes understanding the different types of data—and the role of a data scientist—more important than ever....
Davis Balestracci's picture
Davis Balestracci
“With data from an epidemic there is no question of whether a change has occurred. Change is everywhere. The question is whether we are getting better or worse. So while the process behavior chart...
Jeffrey Phillips's picture
Jeffrey Phillips
Throughout human history we’ve constantly sought out tools and capital to make us more productive. From the formation of basic tools to assist in farming to real cultivation and shaping of the...
Donald J. Wheeler's picture
Donald J. Wheeler
In May 2019, James Beagle and I published an article that contained tables for the analysis of mean moving ranges or ANOMmR (pronounced a-nom-m-r). By request of those using this technique, I...
Donald J. Wheeler's picture
Donald J. Wheeler
The daily Covid-19 pandemic values tell us how things have changed from yesterday, and give us the current totals, but they are difficult to understand simply because they are only a small piece of...
Taran March @ Quality Digest's picture
Taran March @ Quality Digest
What is quality intelligence, exactly? It’s more than marketing spin. More, even, than the sum of its many control charts. It’s not collecting data simply to further go/no-go actions. And it doesn’t...
Ryan E. Day's picture
Ryan E. Day
An organization can achieve great results when everyone is working together, looking at the same information generated from the same data, and using the same rules. Changes can be made that affect a...
Dirk Dusharme @ Quality Digest's picture
Dirk Dusharme @ Quality Digest
Blame it on Moore’s law. We live in a digital Pangaea, a world of borderless data driven by technology, and the speed and density with which data can be transmitted and handled. It’s a world in which...
Ryan E. Day's picture
Ryan E. Day
It’s no secret that manufacturing companies operate in an inherently unstable environment. Every operational weakness poses a risk to efficiency, quality, and ultimately, to profitability. All too...
Eric Weisbrod's picture
Eric Weisbrod
For nearly a century, statistical process control (SPC) has been the cornerstone of quality management and process control. But traditional SPC can’t keep up as the pace of manufacturing accelerates...
Puerto Rico Manufacturing Extension's picture
Puerto Rico Manufacturing Extension
El-Com Systems Corp. is a wholly-owned subsidiary of El-COM Systems Solutions based in California. The local company has been in Puerto Rico since 2016 operating in Caguas. The company is dedicated...
Paul Laughlin's picture
Paul Laughlin
One of the most practical data visualization books for my clients is Storytelling With Data (Wiley, 2015). So, this is a longer-than-usual book review of this modern classic. I say that because it...
Donald J. Wheeler's picture
Donald J. Wheeler
Setting the process aim is a key element in the short production runs that characterize the lean production of multiple products. Last month in part one we looked at how to use a target-centered XmR...
Gleb Tsipursky's picture
Gleb Tsipursky
So many companies are shifting their employees to working from home to address the Covid-19 coronavirus pandemic. Yet they’re not considering the potential quality disasters that can occur as a...