If SPC is not in the hands of the person who can actually make adjustments to the process, then what you have is not SPC but SPM (Statistical Process Monitoring). Put SPC in the hands of the process operator. #CHECKLIST TO ESTABLISH SPC SYSTEM HOW TO#Finally, we show how software can automate the process and ensure people learn how to interpret and apply what they have learned. Then we transition into the specific types of charts that people will be using. In our courses, we use the Statapult (Statistical Catapult) as a hands-on tool to involve people in appreciating the power of statistical thinking and to provide a laboratory for learning. Training should be participatory and allow people to experience first hand how variation is reduced. Use training to instill into people a deep appreciation for the purpose of SPC. Another potential problem is non-normal data where special techniques such as power transformations are necessary. #CHECKLIST TO ESTABLISH SPC SYSTEM SERIES#Time series models and residual charts must be used instead. A Shewhart Control Chart cannot be used in these situations. In process industries, most processes exhibit autocorrelation, which just means that data values are not statistically independent but are related in time sequence. It will be pointless and lead you to wrong conclusions. Using the wrong chart, such as a classic average range (Xbar R) chart for time to time variation, will not work. For each of these types there are specific charts that must be used. You will need to understand that there are different types of variation, piece to piece, time to time, and occurrence rate variation. Management must understand and champion this. Critical in successful implementation is to infuse a passion into the organization to reduce variation and defect rates in all processes. These are all designed to give new language to the task at hand, which is to reduce variation as near to zero as possible. This is why companies such as Motorola pioneered programs like Six Sigma. Measuring and reducing variability are the keys to success. Variation is the enemy of quality because it masks accuracy and destroys consistency. For this reason, here’s a checklist for your own organization.ĭevelop a passion for reducing variation in all processes. Many organizations have embraced SPC because they have been told that it is the right thing to do. Today, SPC is a critical part of practices used to control and improve quality, not only in manufacturing but in all sorts of transactional endeavors. Edwards Deming, who introduced them to Japan in 1948. Shewhart’s charts spawned a huge improvement in industrial quality control and were widely promoted by the American Society for Quality (ASQ) and by consultants such as Dr. The idea of charting process characteristics was pioneered by Walter A. It uses graphical charts to depict process characteristics such as the process centre, the process spread or the defect rate.
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