Human Errors Analysis and Safety Management Systems in Hazardous Activities

Leva, M.C. (2005). Human Errors Analysis and Safety Management Systems in Hazardous Activities. IIASA Interim Report. IIASA, Laxenburg, Austria: IR-05-003

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Abstract

The present report describes human error analysis as emerged from the Three Mile Island accident, that was a milestone in the development of studies on human factors; it then presents some methods to quantify and analyse the risks related to human error. A further case of analysis is examined, focusing on the importance of organizationalrelated factors, as the Root causes of operator-error at the sharp end of the accidents chain of events. Some of the most relevant managerial/organizational factors are discussed, following the classification that G.Drogaris (G.Drogaris 1993) derived from his analysis of the MARS database. The classification is then confronted with the aspects required by the Seveso II Directive for a Safety Management System. Finally the sixth chapter considers the way in which human factors are analyzed in the Safety Management System of an Italian Oil Refinery, and possible ways of placement and improvements of this process through a particular use of the Success Likelihood Index Methodology.

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