Height gages have achieved a nearly universal presence in the quality control world. It is rare to see a QC department without at least one or two of these instruments. This commonality makes it easy to overlook just how accurate and flexible these devices are. They measure much more than the term “height gage” would imply.
Just as a recipe designed for four may require some changes if it is called upon to serve 4,000, dramatically up-scaling the number of quality metrics being monitored may demand new approaches when deploying SPC.