e, corresponding to the lessened
effort. All methods should, therefore, as far as possible, be made
up of standard elements under standard conditions, with standard
devices and appliances, and they should be standardized from the
standpoint of all of our senses as to color, shape, size, weight,
location, position and surface texture, that the worker may grasp at
a single thought by means of each or all his senses, that no special
muscles or other fatiguing processes need be operated to achieve the
standard result desired.

MUSCLES THAT TIRE EASILY SHOULD BE SAVED.--It must be remembered
that all work should be so arranged that the muscle that changes the
position or shape of the eye or the size of its pupil should not be
operated except when necessary. Care in planning can oftentimes
standardize conditions so as to relieve these and other muscles,
which grow tired easily, or transfer this work to other muscles
which are not so easily tired.

Not only do the reactions from such standards require less
bodily effort, but it also requires less mental effort to work under
methods that are standardized. Therefore, both directly and
indirectly, the worker benefits by the standardization.

REST FROM FATIGUE IS PROVIDED FOR SCIENTIFICALLY.--Scientific
Management provides and prescribes rest for overcoming fatigue of
the worker more scientifically and economically than he could
possibly provide it for himself. Weber's law is that "our power of
detecting differences between sensations does not depend on the
absolute amount of difference in the stimuli, but on the relative
amount."[11] The additional fatigue from handling additional weights
causes fatigue to increase with the weight, but not in direct
proportion to the extra weight handled. When the correct weight of
the unit to be handled has been determined, the additional weight
will cause fatigue in quantities greater in proportion than the
extra weight handled.

REST PERIODS ARRANGED FOR BEST GOOD OF WORK AND WORKER.--If
possible, rest from fatigue is so arranged as to interfere with work
the least. The necessary rest periods of the individuals of a gang
should come at that period of the cycle that does not cause any
allowance to be made for rest in between the performance of the
dependent operations of different members of the gang. Such an
arrangement will enable the worker to keep a sustained interest in
the work.

WORK WITH ANIMALS SHOULD BE STA