Use Numbers Not Percentages
Ever noticed that when you describe something as a percentage people seem to draw a blank? They may nod, but not understand. Here’s why:
“I’m Jay Arthur, author of “Lean Six Sigma Demystified” and QI Macros [software].
“I want to alert you to something that I discovered when I saw my friend, Dr. Jack ReVelle, speak. Now, if you know anything about control charts, you know that if you have an upper and lower control limit, well, 99.7% of all points should fit between those two things. And I saw Jack talk about this and I realized that nobody can make a picture of a percentage.
