HOW TO EVALUATE EFFECTIVENESS IN MONITORING AND DETECTION TASKS IN NUCLEAR POWER PLANTS?

in this study, the monitoring and detection process of operators in NPPs are investigated based on theoretical and empirical background. Then developed are measures of attentional resources effectiveness which represent how well operators monitor and detect the environment. Fixation to Importance Ratio (FIR) which represents the ratio of relative attentional resources spent on an information source to relative importance of the information sources is considered as a measure of the attentional resources effectiveness. Eye fixation number (or duration) is used as the attentional resource. The importance of various information sources is obtained based on the dynamic of the NPP system using the analytic hierarchy process (AHP). FIRs for all information sources are integrated into an overall measure which is called Selective Attention Effectiveness (SAE). Experiment results show that the developed measures can reveal the effectiveness in monitoring and detection tasks and further can be effectively used for finding out drawbacks of man-machine interfaces.