SPC – Lean Six Sigma Moneybelt

Improvement Insights Blog

Posts tagged "SPC"

You Don’t Need to Know Statistics to Do Statistical Process Control (SPC)

People think you have to know statistics to do Statistical Process Control (SPC). Not true, here’s why.

“I’m Jay Arthur, author of “Lean Six Sigma For Hospitals” and QI Macros [software].

“I’ve noticed that whenever I say the phrase “Statistical Process Control,” people start to freak out. It’s unnecessary because guess what? You don’t need to know statistics to do Statistical Process Control.

“Shewhart was a statistician, he figured out how to calculate the variances and… how to calculate the upper and lower control limits and what that all means. Then Nelson expanded all of that stuff, so the statisticians did the statistical part.

Posted by Jay Arthur in Improvement Insights, QI Macros.

Think SPC is Too Complex?

Most people are terrified of “statistical” anything. Do you think SPC is too complex? You may not like the alternative.

“Whenever I talk to people about Statistical Process Control, first the word “statistical” scares the living crap out of them. But they say, “Well, you know, uh… I’m not that good with math and formulas,” and I say, “Well, you don’t have to know math and formulas. We’ve got software that’ll do all that for you. What you have to do is know what the chart tells you about what you should do about your process. They’re all a little surprised.

Posted by Jay Arthur in Improvement Insights, Lean, Six Sigma, Statistics.

Are You Sewing Your Own Six Sigma Toolkit?

Mom used to sew all of her own clothes, just like many people in Six Sigma are creating their own chart templates or code. Mom figured out a better way. You can too.

“Growing up in the 50s, my mom made all of her own clothes. She would go to the fabric store and pick out fabrics and pick out patterns. She’d come home and on this big cardboard thing she’d lay out the pattern on the thing and cut out all the pieces. Then she’d have bought thread, and then she’d sit there at the sewing machine and she would sew blouses and skirts and dresses.

Posted by Jay Arthur in Improvement Insights, Lean, Six Sigma.

Why Big Data is Bad for Small Business

There’s a lot of hype about Big Data, but approximately three-quarters of the money spent had no return on investment. There’s big profits in small data. Here’s what to do differently.

“Hi, this is Jay Arthur, author of “Lean Six Sigma Demystified” and the QI Macros [software].

“Big Data is actually bad for small business. Now, there was a lot of hype around Big Data, but it kind of crested about 2011-2012 and it’s falling down now because people are discovering that Big Data doesn’t always give you the answers you want. What you need [is] small data, and there’s big profits in small data.

Posted by Jay Arthur in Data Mining, Improvement Insights.

Cholera and COVID-19 Hot Spot Detection and Quarantine

There are COVID-19 hot spots and cold spots. How do we keep the cold spots open and detect and quarantine warming spots? Maybe statistical process control can help.


“Hi, I’m Jay Arthur, author of “Lean Six Sigma for Hospitals” and QI Macros [software].

“Back in the mid 1800s there was a cholera outbreak in London, and John Snow (not of Game of Thrones, but Dr. John Snow) said, “I think there’s a pattern here.” He went out and figured out that everybody who had cholera was getting water from the Broad Street pump. Back then, there was no indoor running water so you had to take your pail, go out to the pump and get your water for your home or your business or your restaurant.

Posted by Jay Arthur in Improvement Insights, Six Sigma.

Statistical Bullies

I spent today coaching a Six Sigma Belt on how to deal with an arrogant statistical bully.

You know the type: they proclaim they have all the answers in an arrogant commanding tone that implies they are smarter than you.  They make statements like:

  • You’re using the wrong data.
  • You’re using the wrong statistics.
  • How did you calculate that statistic…it’s wrong.
  • Excel is unacceptable for statistical analysis.
  • and on and on.

These bullies have invested heavily in training to become an expert. If anyone can become an expert, what value do they have? And most of us, lacking their education, defer to their comments…unless we have the courage to investigate their allegations.

Posted by Jay Arthur in Six Sigma.