time and motion study

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An analysis of the efficiency with which an industrial operation is performed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun an analysis of the motions used in an industrial process with an aim to improve efficiency and productivity

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an analysis of a specific job in an effort to find the most efficient method in terms of time and effort