Abstract
To use processors practically, it is important to know about not only the performance but also its cost for machine maintenance. In this report, we traced the repairing histories of 13 processors operating in Miyazaki area, and calculated the repair fees of them also. We found that there are many easy cases included in whole repairing histories, so as a result of this study, we propose that machine user should be trained as a mechanic and repair small troubles by themselves for total cost reduction.