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Frank and Lillian Gilberth, in their time and motion study, developed what they called "therbligs" (Gilbreth spells backwards with the t and h transposed). The therbligs is a classification scheme from labelling 17 basic hand motions.
The time and motion study looked to reduce the number of motions in performing a task in order to increase productivity. The best known experiment involved bricklaying. Through carefully scrutinising a bricklayer's job, Frank Gilberth reduced the number of motions in laying a brick from 18 to about 5. Hence the bricklayer both increased productivity and decreased fatigue.
Robbins, S.P., Bergman, R., Stagg, L, & Coulter, M. (2003) Managment (3rd Edition). Sydney, Australia: Prentice Hall
A time and motionstudy (or time-motion study) is a business efficiency technique combining the TimeStudy work of Frederick Winslow Taylor with the MotionStudy work of Frank and Lillian Gilbreth (best known through the biographical film and book Cheaper by the Dozen).
A time and motionstudy would be used to reduce the number of motions in performing a task in order to increase productivity.
Through carefully scrutinising a bricklayer's job, Frank Gilberth reduced the number of motions in laying a brick from 18 to about 5.
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