CorrectSPC PROCESS CONTROL FOR PRECISION MACHINING © 2010 Bob Doering All Rights Reserved
TRADITIONAL SPC Expects all “special causes” have been eliminated Expects the remaining variation is random, with most variation close to a central value Seeks to find trends from within an otherwise random output to act upon when they occur
Search for Extraterrestrial Intelligence TRADITIONAL SPC Search for Extraterrestrial Intelligence (SETI) Traditional SPC is like looking out into space seeking signs of life
TRADITIONAL SPC Typically, you listen to random radio frequency noise looking for a “pattern” – as a pattern shows intent
Wow! signal was a strong narrowband radio signal detected by TRADITIONAL SPC Wow! signal was a strong narrowband radio signal detected by Dr. Jerry R. Ehman on August 15, 1977, while working on a SETI project at The Big Ear radio telescope of The Ohio State University If you find such a trend, then you can take action to determine its origin. This is more “monitoring” than “control”