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Expert judgement and lethal toxicity of inhaled chemicals

Author

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  • L.H.J. Goossens
  • R.M. Cooke
  • F Woudenberg
  • P Van Der Torn

Abstract

The application of formal expert judgement for assessing quantitative data of the toxicity of large amounts of inhaled chemical substances after a potential major hazards incident is described. In this particular application, the expert assessments were used to derive probit relations for the acute lethal effects of five hazardous substances: ammonia, acrylonitrile, hydrogen fluoride, sulphur trioxide and azinphos-methyl. The purpose of the study was to develop a protocol for selecting experts and the elicitation and analysis of expert assessments, to apply this protocol to generate probit relations for representative substances, and to evaluate the overall performance of the protocol. The use of formal expert judgement includes quantitative estimates of variables, calibration of experts and representation of uncertainty on the variables. This enables analysts to optimize combined experts' assessments for establishing quantitative results for further use in probit relations. Twenty-seven experts, distributed over the five substances, gave medians and 90% central confidence bands of the lethal dose-response relations under several conditions. The calculated dose-response relations are shown and compared to existing probit relations with respect to its impact on risk assessment outputs. The calculated relations can be applied in quantitative risk assessments, for example, under the Dutch law on major hazards installations. The scientific and practical efforts and costs of using the expert judgement technique are described.

Suggested Citation

  • L.H.J. Goossens & R.M. Cooke & F Woudenberg & P Van Der Torn, 1998. "Expert judgement and lethal toxicity of inhaled chemicals," Journal of Risk Research, Taylor & Francis Journals, vol. 1(2), pages 117-133, April.
    • Handle: RePEc:taf:jriskr:v:1:y:1998:i:2:p:117-133
    DOI: 10.1080/136698798377222
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    Cited by:

    1. H. J. Van der Fels‐Klerx & Roger M. Cooke & Maarten N. Nauta & Louis H. Goossens & Arie H. Havelaar, 2005. "A Structured Expert Judgment Study for a Model of Campylobacter Transmission During Broiler‐Chicken Processing," Risk Analysis, John Wiley & Sons, vol. 25(1), pages 109-124, February.
    2. Lin, Shi-Woei & Bier, Vicki M., 2008. "A study of expert overconfidence," Reliability Engineering and System Safety, Elsevier, vol. 93(5), pages 711-721.
    3. Ine H. J. Van Der Fels‐Klerx & Louis H. J. Goossens & Helmut W. Saatkamp & Suzan H. S. Horst, 2002. "Elicitation of Quantitative Data from a Heterogeneous Expert Panel: Formal Process and Application in Animal Health," Risk Analysis, John Wiley & Sons, vol. 22(1), pages 67-81, February.
    4. Roger M. Cooke & Margaret MacDonell, 2008. "Regulating Under Uncertainty: Newsboy for Exposure Limits," Risk Analysis, John Wiley & Sons, vol. 28(3), pages 577-587, June.
    5. Cooke, Roger M. & Goossens, Louis L.H.J., 2008. "TU Delft expert judgment data base," Reliability Engineering and System Safety, Elsevier, vol. 93(5), pages 657-674.

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