Deming's funnel: Difference between revisions

[[wp:W. Edwards Deming|W Edwards Deming]] was an American statistician and management guru who used physical demonstrations to illuminate his management teachings. In one such demonstration he repeatedly dropped multiple marbles through a funnel at a target, marking where they landed, and observing the resulting pattern. AHe applied a sequence of "rules" are tested to try to improve performance. In each case, the experiment begins with the funnel positioned directly over the target.

* '''Rule 2''': Adjust the funnel position by shifting the target to compensate forafter theeach missdrop. E.g. If the last shotdrop missed 1 cm east, move the funnel 1 cm to the west of its current position.

* '''Rule 3''': As rule 2, but first move the funnel back over the target, before making the adjustment. E.g. If the funnel is 2 cm north, and the marble lands 3 cm north, move the funnel 3 cm south of the target.

* '''Rule 4''': The funnel movesis moved directly over the last place a marble landed.