Top-down and bottom-up definitions of human failure events in human reliability analysis
In the probabilistic risk assessments (PRAs) used in the nuclear industry, human failure events (HFEs) are determined as a subset of hardware failures, namely those hardware failures that could be triggered by human action or inaction. This approach is top-down, starting with hardware faults and deducing human contributions to those faults. Elsewhere, more traditionally human factors driven approaches would tend to look at opportunities for human errors first in a task analysis and then identify which of those errors is risk significant. The intersection of top-down and bottom-up approaches to defining HFEs has not been carefully studied. Ideally, both approaches should arrive at the same set of HFEs. This question is crucial, however, as human reliability analysis (HRA) methods are generalized to new domains like oil and gas. The HFEs used in nuclear PRAs tend to be top-down—defined as a subset of the PRA—whereas the HFEs used in petroleum quantitative risk assessments (QRAs) often tend to be bottom-up—derived from a task analysis conducted by human factors experts. The marriage of these approaches is necessary in order to ensure that HRA methods developed for top-down HFEs are also sufficient for bottom-up applications.
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- Resource Relation:
- Conference: Annual International Meeting of the Human Factors and Ergonomics Society, Chicago, IL (United States), 27-31 Oct 2014
- Research Org:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
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- Country of Publication:
- United States
- 29 ENERGY PLANNING, POLICY, AND ECONOMY; 02 PETROLEUM; 03 NATURAL GAS; RELIABILITY; HUMAN FACTORS; NUCLEAR INDUSTRY; PETROLEUM INDUSTRY; PROBABILISTIC ESTIMATION; RISK ASSESSMENT; ERRORS; FAILURE MODE ANALYSIS; NATURAL GAS INDUSTRY human failure event; human reliability analysis; probabilistic risk assessment
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