2. Necessary fatigue, which results from work that must be done. The new method, which enabled this same bricklayer to lay three hundred and fifty bricks per hour, where he had laid one hundred and twenty bricks per hour before, did not eliminate, and did not expect to eliminate all of the fatigue accumulated in the working day. The bricklayer at the end of the day, by reason of motion study devices, laid more brick, but was nevertheless much less tired. Experimental work in his case was carried to a high degree of perfection, because he was recognized as a splendid type of efficient brawn.
The Problems of Fatigue Study.
The problems of fatigue study are, then, four, which may be stated in very simple terms:
1. To determine what fatigue is unnecessary.
2. To determine what fatigue is necessary.
3. To eliminate all unnecessary fatigue possible.
4. To distribute the necessary fatigue properly, and to provide the best possible means for speedy and complete recovery.
The Methods of Fatigue Study.
The methods used must rest on a scientific basis. These methods are the same for the expert and for the man making his first attack on the problem. They are as follows:
1. Record present practice, make an accurate and complete account in writing of what is actually being done.