See how the target Xbar-s chart enables plant-floor personnel to maintain tight tolerances on high-volume production lines.
Target Xbar and s (Xbar-s) charts can help you identify changes in the average and standard deviation of a characteristic. Review the following example—an excerpt from Innovative Control Charting1—to get a sense of how a target Xbar-s chart works.
Figure 1. Rivet head height is a key characteristic. The measurement is taken with the aid of a gauge block.