Abstract
The present study is undertaken to obtain the basic data to determine the working area in horizontal plane in consideration of the size of the object at work. We measured the movement of both arms of fifteen right-handed female students in sitting position. The distance between working surface and chair is one third of her sitting height. And the measurements were done in three points of both arms; radiale, stylion and the third phalangion of little finger. Also the measurement was done at seven levels in the forward direction and at ten levels in right and left direction. From the measurement result, the regression equations were obtained. Using these equations, the information of the size of the object at work determines the position of radiale, stylion and the third phalangion of little finger, and also working area dealing with the object at work. Therefore it is very useful to improve the assignment of working area layout.
