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Reviewing human-related methods, we found HFACS (Human Factors Analysis and Classification System) provided a predetermined set of causal factors by incorporating various "upstream and latent" factors.
The traditional HFACS index system [3, 6, 8] only considers the impact of a one-way relationship between adjacent levels, which makes expressing the relationship of interdependence between all levels of factors difficult.
A maintenance adaptation of the HFACS methodology (Schmidt, Schmorrow, & Hardee, 1998) assists the investigator in identifying maintenance actions using a taxonomy based on that of Reason (1990) and provides 25 potential latent conditions that contribute to maintainer errors.
They invented the human-factors analysis and classification system (HFACS) you'll use if you serve on an aircraft-mishap board.
The other 53 mishaps were attributed to what the newly incorporated DoD human-factors analysis and classification system (HFACS) labels as "acts." In other words, it was actions the aircrew did, or did not do, that caused the mishap.
Safety Center analysis of Class-A flight mishaps for FY00 to FY06 has found the percentages of the following fatigue-related HFACS nanocodes: fatigue-physiological/ mental, circadian rhythm desynchrony, and inadequate rest, in the aviation communities listed in the table.
You can read an expanded version of this article, including an HFACS breakdown of the listed mishaps, at http://www.safetycenter.navy.mil/aviation/index.asp
The DoD Human Factors Analysis Classification System (HFACS) is an investigative tool designed to classify not only the initial errors made in aviation, but also to identify the root causes and contributing factors to those errors.
Using the human-factors analysis and classification system (HFACS), we started a historical-mishap analysis by community, and the preliminary results are being shared with aviation leadership.
The Navy's Human Factors Analysis Classification System (HFACS) of accident causation defines the logical progression through which these errors can be traced and causal factors explained.
To learn more about the Human Factors Analysis and Classification System (HFACS), which describes the "Swiss cheese" model mentioned in this article, read the Approach "Work Zone" entry in the July-August 2004 issue.
Deborah White, on our aeromedical staff, is our POC for HFACS and can answer your questions.
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- HF Verwoerd
- HF1 (protein)
- HFA 2000