Background: Safety risk assessment of human-computer interaction behavior is very important
for safety design and management in complex human-computer system such as airplane cockpit
and monitoring system in nuclear power plant. Many major accidents were a result of lack of efficient
hazard identification and risk assessment approaches, as described in various patents.
Methods: The process of human-computer interaction risk assessment is established. The event tree
analysis is employed to identify the hazard to the system and human beings. The dynamic safety risk
assessment model is provided based on Bayesian network (BN) considering the uncertainty and
correlation of the human-computer interaction behaviors. The safety risk level could be determined by
matching the risk matrix with the assessment results on severity and probability.
Results: An illustration, which takes a typical human-computer system as the study object, shows that
the approach proposed in this paper is suitable and efficient for safety risk assessment of humancomputer
Conclusion: With the development of technologies, the safety risk of the systems with human in the
loop has received increasing attention. Safety risk assessment of human-computer interaction behavior
is a very important part for safety design and management in complex human-computer system
such as cockpit of vehicles and monitoring systems in nuclear power plant so that the user experience
would be enhanced and safety risk would be controllable.