Author: Herb Robbins Company: Robbins International Date Published: 10/24/2010
Abstract: A process is not performing well and you’ve been assigned the improvement task. Where do you start? What data do you have? What decisions can you make to ensure that you are working on the right thing or things? These are not uncommon questions. All too often engineers and others jump directly into the process to try to reduce variation. They believe that if they can better control process variables, then the defect rate will drop. This may very well be true, but at what rate will the defects drop and at what cost? Is it possible that they’ve missed a larger source of variation?