Therblig
Therblig : A unit of physical activity used in time-and-motion studies in industrial engineering. A therblig represents one of 18 standardized activities identified by the American industrial psychologists Frank B. Gilbreth (1868-1924) and Lillian Moller Gilbreth (1878-1972): search, find, select, grasp, hold, position, assemble, use, disassemble, inspect, transport loaded, transport unloaded, pre-position for next operation, release load, unavoidable delay, avoidable delay, plan, and rest for overcoming fatigue. The word is Gilbreth spelled backwards (considering "th" as one letter)
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