Fig. 22
Typical chronocyclegraph of the motion and fatigue study of a bricklayer, laying three bricks in the old method.
Fig. 23
Typical cyclegraph of motion and fatigue study on a drill press, showing cyclegraph of path of motions of the left hand.
Fig. 24
Typical chronocyclegraph of compositor setting type by hand.
Testing the Work by Motions Required.
It is for motion study to explain the methods of deducing standard methods by using activity records obtained through the various types of motion study data. Many such standards have been derived. We have in our motion study data many elementary motions with records of the space they cover and the amount of time they require. With these we can test the given work to see which of these motions it includes. Having tabulated this, we can make an intensive study of the motions that remain. When this study has been made, we can combine the resulting elementary motions that have proven themselves most efficient into the working method, and classify the work as work of a type requiring a certain set combination of motions.
Testing Workers by Motion Capabilities.
In the same way we may test a worker by motion learning capabilities, before assigning him to any kind of work. Having reduced activities to their motions, we can test the worker’s physical capability; his mental capability we can test by determining his learning curve. To these results we add a record of his interest in various types of work. From the resulting three types of records, we can make placements that, we believe, are far in advance of any that have been made up to the present time.