On making decisions with averaging:
I was giving an ASQ presentation one time in a hotel conference room with no windows. One of the section members got a call from his wife asking if he was OK. He responded "OK with what?" Apparently, a tornado had passed by the area where we were. It hit a Staples store on one side of us and a greenhouse on the other side of us. It was a stupid tornado, because there was a perfectly good trailer park right near us, and it went for a greenhouse. (For those of you not familiar with tornados, for some reason they typically have a taste for trailer parks.) So,
on the average, it was a direct hit. So, had we made decisions based on
averages, we should have started to rescue people from the rubble....but.....there was no rubble.