time and motion study

WordReference Random House Unabridged Dictionary of American English © 2026

time′ and mo′tion stud′y, 

1. the systematic investigation and analysis of the motions and the time required to perform a specific operation or task with a view to seeking more efficient methods of production as well as setting time standards. Also called time study, motion study. 

Collins Concise English Dictionary © HarperCollins Publishers::

time and motion study noun

1. the analysis of industrial or work procedures to determine the most efficient methods of operation
   Also: time and motion, time study, motion study