ABSTRACT
Accidents on the railways often contain a strong element of human error as a causation factor. It is estimated that approximately 80 – 90 % of all major accidents have been caused in part by human error (RSSB; 2001). Human error also contributes to business risk, such as the reliability of the rail network. The ability to predict probable errors in new or changing rail systems, and to analyse errors that have already occurred, provides the opportunity to reduce the potential for error occurrence through error mitigation and reduction strategies. Therefore Human Error Identification (HEI) and Human Error Quantification (HEQ) techniques, collectively known as Human Reliability Assessment, are important risk assessment and risk reduction tools in the rail industry.
