Principles of Motion Economy

Use of the Human Body

1. The two hands should begin as well as complete their motions at the same time.
2.The two hands should not be idel at the same time except during rest periods.
3.Motions of the arms should be made in opposite and symmetrical directions and should be made simulataneously.
4. Hand and body motions should be confined to the lowest classification with which it is possible to perform the work satisfactorily.
5. Momentum should be employed to assist the worker wherever possible, and it should be reduced to a minimum if it must be overcome by muscular effort.
6. Smooth continuous motion of the hands are perferable to straight line motions involving sudden and sharp changes in direction.
7. Ballistic movements are faster, easier and moe accurate than restricted (fixation) or controlled movements.
8. Work should be arranged to permit an easy and natural rhythm wherever possible.
9. Eye fixations should be as few and as close together as possible.