Where a general study is being made of the time required to do all kinds of hand work connected with and using machine tools, the items printed in detail should be timed singly.
When some special job, not to be repeated many times, is to be studied, then several elementary items can be grouped together and studied as a whole, in such groups for example as:
(a) Getting job ready to set.
(b) Setting work.
(c) Setting tool.
(d) Extra hand work.
(e) Removing work.
And in some cases even these groups can be further condensed.
An illustration of the time units which it is desirable to sum up and properly record and index for a certain kind of lathe work is given in Fig. 6.
SIGNED TOTAL FIGURE 6. -INSTRUCTION CARD FOR LATHE WORK (not shown)