ABSTRACT
Avoid straight-line, jerking arm motions. 10. Design so arm movements pivot about the elbow rather than around the
shoulder to avoid stress on shoulder, neck, and upper back. 11. Design the primary work area so that arm movements or extensions of more
than 15 in. are minimized. 12. Provide dials and displays that are simple, logical, and easy to read, reach,
and operate. 13. Eliminate or minimize the effects of undesirable environmental conditions
such as excessive noise, heat, humidity, cold, and poor illumination.
