No plan can prevent a stupid person from doing the wrong thing in the wrong place at the wrong time - but a good plan should keep a concentration from forming.
Source: In Quotable Business, ed. Louis E. Boone, 1992.
-- Charles E Wilson, ( 1890-1961), US executive; He was an electrical engineer who led General Motors through WWII as a major producer of military vehicles; Eisenhower's outspoken secretary of defence (1953-7).