In ordinary manufacturing lines, worker’s proficiency degree in the manufacturing operations was evaluated by a unit time or cycle time of making products. In this manner, it is hard to understand how the worker accomplishes the manufacturing operation and tasks with specific motions and objects derived from the hands, body and/or eyes. To overcome this limitation, we investigated the degree of worker’s proficiency of four elemental processes with methods of evaluation to estimate the connectivity between the sensory and motor integrations in human brain information processing. We measured eyes and body movements when workers manufactured products through three months. The developed method could differentiate the worker’s proficiency degrees between experts and novices. Coincidentally, expert workers had relatively high levels at every elemental process compared to novice workers who had low levels in two of the four elements. These results show the possibility that novices are not as proficient as experts when memorizing correct procedures as they are more likely to discriminate a specific point to accomplish tasks due to immature memory functions within the brain.
