- Therblig
A therblig is the name for one of a set of fundamental motions required for a worker to perform a manual operation or
task . The set consists of 18 elements, each describing a standardized activity. These are listed below.:*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:*Rest to overcome fatigue
The therblig is used in the study of motion economy in the
workplace . A workplace task is analyzed by recording each of the therblig units for aprocess , with the results used for optimization of manual labor by eliminating unneeded movements.The word "therblig" is a reversal of the word "Gilbreth", with 'th' treated as one letter. It was the creation of
Frank Bunker Gilbreth andLillian Moller Gilbreth , the American industrial psychologists who invented the field oftime and motion study .References
* Gilbreth, Frank Jr., and
Ernestine Gilbreth Carey , 1948. "Cheaper by the Dozen ". ISBN 0-06-008460-X
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