Ralph Mosser Barnes

Ralph Mosser Barnes (October 17, 1900 - November 5, 1984) was an American industrial engineer and Professor of Industrial Engineering at the University of Iowa, and the University of California, Los Angeles. He is known as author of the 1937 "Motion and Time Study," which would become standard work for industrial engineers for generations, and as recipient of the 1941 Gilbreth Medal. Provided by Wikipedia