• Thomas Diller, George Helmrich, Sharon Dunning, Stephanie Cox, April Buchanan, and Scott Shappell.
• 1Greenville Health System, Greenville, SC.
• Am J Med Qual. 2014 May 1;29(3):181-90.

AbstractIn spite of efforts to improve patient safety since the 1999 report, To Error Is Human, recent studies have shown limited progress toward preventing serious error. Most hospitals use root cause analysis as a method of serious event investigation. The authors postulate that this method suffers from 4 problems: (a) the use of root cause analysis is neither standardized nor reliable between organizations, (b) hospitals focus on "who" did "what" rather than on "why" the error occurred, (c) the identified causes are often too nonspecific to develop actionable correction plans, and (d) a standardized nomenclature does not exist to allow analysis of recurring errors across the organization. This article describes the modification of the Human Factors Analysis Classification System based on James Reason's theory of error causation for use in health care. This method resolves the 4 deficiencies noted above. The authors' experience investigating 105 serious events over 2 years is described.

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