Standard (unit)

Definition and stakes

Portrait of Lillian Moller Gilbreth Lillian Moller Gilbreth,  The Psychology of Management

“ A standard remains fixed only until a more perfect standard displaces it. The data from which the standard was derived may be reviewed because of some error, because a further subdivision of the elements studied may prove possible, or because improvements in some factor of the work, i.e., the worker, material, tools, equipment, etc., may make a new standard desirable. ”
Source: Gutenberg

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