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Risk, human error, and system resilience: fundamental ideas.
1Volpe National Transportation Systems Center, Cambridge, MA 02142, USA. sheridan@volpe.dot.gov
Human Factors
|August 12, 2008
Summary
Traditional error analysis and resilience engineering offer complementary safety strategies. Combining both approaches is recommended for optimal risk management and system safety.
Area of Science:
- Human factors engineering
- Systems safety analysis
- Organizational safety science
Background:
- Human error analysis has been a cornerstone of safety for 50 years.
- Resilience engineering is a newer paradigm focused on adapting to unforeseen events.
Purpose of the Study:
- To review and critique traditional error/risk analysis and resilience engineering.
- To contrast their fundamental ideas and human factors applications.
Main Methods:
- Comparative analysis of two safety paradigms.
- Review of human factors applications in each approach.
Main Results:
- Traditional risk analysis offers mathematical rigor but struggles with predicting future events due to arbitrary error definitions and changing conditions.
- Resilience engineering focuses on organizational processes for anticipating, mitigating, and recovering from future events.
Conclusions:
- Resilience engineering complements traditional error analysis.
- Both approaches are essential for a comprehensive safety strategy, though resilience engineering needs further development in quantification and operational methods.
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