ABSTRACT
J.L. Bell Health and Safety Laboratory, Harpur Hill, Buxton, UK
ABSTRACT: From time to time, the Human ReliabilityAssessment (HRA) Community has expressed concern about the age of the data that underpin HRA methods. This paper outlines what the last 30 years’ Human Factors literature has added to the data that underpin the Human Error Assessment and Reduction Technique. 32 of the 38 Error Producing Conditions (EPC) have been found to be consistent with the original concepts and multipliers, some slight revision of factors and distributions is justified, and 2 new EPCs have been incorporated. Most of the GenericTaskTypes (GTT) look to be well-supported, but the Human Error Probability distributions would benefit from further scrutiny and research application. Our work has highlighted that there are some important gaps in the HRA Community’s current knowledge, such as those to do with quantifying EPCs involving Unfamiliarity, Conflict of Objectives, High Emotional Stress, Lack of Exercise and GTTs involving high and low reliability tasks.
