This is a continuation of my last column, which I’ve written to honor my late dad who loved golf.

I’ve never understood the fascination with selfies.

It’s usually not a good idea to rely solely on a single statistic to draw conclusions about your process. Do that, and you could fall into the clutches of the “duck-rabbit” illusion shown below.

While the computations for a process behavior chart are completely general and very robust, the secret to using a process behavior chart effectively lies in the art of rational sampling and rational subgrouping.

Generally speaking, I have a problem with authority. I don’t like being told what to do or how to do it. I’m not proud of that.