Abstract
The automatic monitoring system of the computer assists to operate personnel to control has already had extensive application commercially. Although highlevel automation has its convenient and security. Supervisory alarms relevantly in the design, fail to consider the human factors mostly. The case of this research is one company of semiconductor industry, the supervisory alarms in wastewater treatment system of facility is improved. Try to apply human factors to find out the most common supervisory alarms problem in wastewater treatment system on the case company, looking over and improving interfaces. Before and after the problems improvement on supervisory alarms in wastewater treatment system, NASA-TLX and experiment performance amount subjective and objective index of examining etc. prove because of method with human factors. The result reveals the effect after improving is good. The tried operators all the satisfaction to system after improving is very high. It is unusual to not merely handle the alarms when on duty, give play to and is analogous to the benefiting of intensity. The mental workload of the tried operators reducing at the same time, deal with the really important unusual incident of alarm in operators very centralized mental and physical efforts. In addition improve the alarm significantly and handle efficiency, the purpose to accord with this research, and can control the improved research of the supervisory alarms to consult relevantly as subsequent semiconductor industry or other industries.