Riding Into the Sunset --Dickeson

A couple of years ago, Peter Brehm of Vertis and John Compton of Fort Dearborn clued me to XmR charting espoused by Donald Wheeler in Building Continual Improvement and his Understanding Variation. This was my epiphany! Jay Arthur makes it duck soup by providing an easy Excel add-in. It's

the ultimate of pragmatic analysis. XmR provides insight for nearly any time-sequential data series in printing or any other business. It provides the needed kick for improvement by internal benchmarking.