Content by Donald J. Wheeler

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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...
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...
Donald J. Wheeler's picture
Donald J. Wheeler
Lean production of multiple products is built on the assumption that the process aim can be properly set for each short production run. This article will describe how to set the process aim so that...
Donald J. Wheeler's picture
Donald J. Wheeler
Each day we receive data that seek to quantify the Covid-19 pandemic. These daily values tell us how things have changed from yesterday, and give us the current totals, but they are difficult to...
Donald J. Wheeler's picture
Donald J. Wheeler
This article is an update to “Tracking Covid-19” that Al Pfadt, Kathryn Whyte, and I wrote last week. In that article we summarized what is known about Covid-19, what has already happened, and...
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Donald J. Wheeler
Based on the professional literature available, there are some inconvenient truths about Covid-19 that are not always considered in the chorus of confusion that exists today. Here we summarize...
Donald J. Wheeler's picture
Donald J. Wheeler
Lean production is built on the explicit assumption that each step is operated predictably and capably. Predictable operation can only be achieved and maintained by using process behavior charts....
Donald J. Wheeler's picture
Donald J. Wheeler
Short Run SPC, Part 1 and Part 2 showed how to use zed charts and difference charts to track the underlying process while making different products. This part will illustrate both the...
Donald J. Wheeler's picture
Donald J. Wheeler
Lean production is built on the explicit assumption that each step is operated predictably and capably. Predictable operation can only be achieved and maintained by using process behavior charts. But...