Such a book
should describe the best method of making, recording, tabulating, and
indexing time observations, since much time and effort are wasted by the
adoption of inferior methods."
Unfortunately this prediction has not yet been realized. The writer's
chief object in inducing Mr. Thompson to undertake a scientific time
study of the various building trades and to join him in a publication of
this work was to demonstrate on a large scale not only the desirability
of accurate time study, but the efficiency and superiority of the method
of studying elementary units as outlined above. He trusts that his
object may be realized and that the publication of this book may be
followed by similar works on other trades and more particularly on the
details of machine shop practice, in which he is especially interested.
As a machine shop has been chosen to illustrate the application of such
details of scientific management as time study, the planning department,
functional foremanship, instruction cards, etc., the description would
be far from complete without at least a brief reference to the methods
employed in solving the time problem for machine tools.
The study of this subject involved the solution of four important
problems:
First. The power required to cut different kinds of metals with tools of
various shapes when using different depths of cut and coarseness of
feed, and also the power required to feed the tool under varying
conditions.
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