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{{Short description|Method to identify causes of accidents and analysis to plan preventive training}}
The '''Human Factors Analysis and Classification System''' (HFACS) identifies the human causes of an accident and offers tools for analysis as a way to plan preventativepreventive training.<ref name="Approach_2004">[https://archive.today/20040803144310/http://www.safetycenter.navy.mil/MEDIA/approach/issues/julaug04/HumanFactors.htm "The Human Factors Analysis and Classification System (HFACS),"]''Approach'', July - August 2004. Accessed July 12, 2007. {{dead link|date=June 2019}}</ref> It was developed by Dr. Scott Shappell of the [[Civil Aviation Medical Institute]] and Dr. Doug Wiegmann of the [[University of Illinois at Urbana–Champaign|University of Illinois]] at Urbana-Campaign in response to a trend that showed some form of human error was a primary causal factor in 80% of all flight accidents in the Navy and Marine Corps.<ref name="Approach_2004"/>
HFACS is based in the "[[Swiss Cheese"cheese model]]" of [[human error]]<ref>Reason, J. [1990] ''Human Error''. Cambridge University Press</ref> which looks at four levels of human failure, including unsafe acts, preconditions for unsafe acts, unsafe supervision, and organizational influences.<ref name="Approach_2004"/>. It is a comprehensive human error framework, that folded [[James Reason]]'s ideas into the applied setting, defining 19 causal categories within four levels of human failure.<ref>HFACS Analysis of Military and Civilian Aviation Accidents: A North American Comparison. ISASI, 2004</ref>
[[File:Swiss cheese model of accident causation with additional labels.png|alt=Swiss cheese model of accident causation|thumb|Swiss cheese model of accident causation]]
