variation

Daniel Barenboim conducts the Chicago Symphony Orchestra in Elgar's Nimrod from the Enigma Variations, opening the 1997 season at Carnegie Hall in tribute to Sir Georg Solti.

Excerpts from W. Edwards Deming's Red Bead Experiment, where workers draw beads from a bowl and are judged on red ones that are largely down to chance. It shows how system variation, not individual effort, drives results.