AbstractBio-mathematical models that predict fatigue and/or sleepiness have proved a useful adjunct in the management of what has been typically referred to as fatigue-related risk. Codifying what constitutes appropriate use of these models will be increasingly important over the next decade. Current guidelines for determining a safe working time arrangement based on model outputs generally use a single upper threshold and are, arguably, over-simplistic. These guidelines fail to incorporate explicitly essential aspects of the risk assessment process – namely, the inherent uncertainty and variability in human sleep–wake behavior; the non-linear relationship between fatigue, task performance and safety outcomes; the consequence of a fatigue-related error and its influence on overall risk; and the impact of risk mitigation or controls in reducing the likelihood or consequence of a fatigue-related error. As industry and regulatory bodies increasingly move toward performance-based approaches to safety management, any fatigue risk management system that includes a bio-mathematical model should specify what exactly is measured by the model, and how the model can be used in the context of a safety management system approach. This will require significant dialog between the various parties with an interest in bio-mathematical models, i.e. developers, vendors, end-users, and regulators.
How should a bio-mathematical model be used within a fatigue risk management system to determine whether or not a working time arrangement is safe?
Accident Analysis and Prevention ; 99 ; 469-473
2015-11-26
5 pages
Article (Journal)
Electronic Resource
English
Sleep , Wake , Circadian rhythms , Sleepiness , Fatigue model , Shiftwork
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