This information for each particular operation should be obtained by
summing up the various unit times of which it consists. To do this, of
course, requires the men performing this function to keep continually
posted as to the best methods and appliances to use, and also to
frequently consult with and receive advice from the executive gang
bosses who carry out this work in the shop, and from the man in the
department of standards and maintenance of plant (j) beneath. The actual
study of unit times, of course, forms the greater part of the work of
this section of the planning room.
(c) TIME STUDY FOR ALL OPERATIONS DONE BY THE VARIOUS MACHINES.
This information is best obtained from slide rules, one of which is made
for each machine tool or class of machine tools throughout the works;
one, for instance, for small lathes of the same type, one for planers of
same type, etc. These slide rules show the best way to machine each
piece and enable detailed directions to be given the workman as to how
many cuts to take, where to start each cut, both for roughing out work
and finishing it, the depth of the cut, the best feed and speed, and the
exact time required to do each operation.
The information obtained through function (b), together with that
obtained through (c) afford the basis for fixing the proper piece rate,
differential rate or the bonus to be paid, according to the system
employed.
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