Research on Human Error in Operation Task Under the Coupling of Time of Day and Stress

By investigating human errors occur in rocket’s fuel-filling mission, several important performance shaping factors (PSFs) which have great influence on human error are revealed. It is also found that among all error modes, timing errors (including action too late and action too early) and omissions (including omitting entire step and omitting operation in step) occur most frequently. Timing errors and omissions are both considered as human errors that fail the mission. This paper selects time of day and stress as two PSFs to study the effects of PSFs on human error probability (HEP). This paper also explores whether there is a coupling between the two PSFs.