FN Data Need Supplement of Temporal Trend Analysis
Mr. Haastrup is certainly correct in emphasizing that the methodology underlying the use of FN curves deserves a more stringent examination. His discussion of uncertainty in FN data is very sobering. Even more sobering is his Figure 9 showing differences in FN curve estimates. How should a regulator apply a societal risk criterion to individual installations when uncertainties in estimated FN relationships are large? This question has not yet received the attention it deserves.
KeywordsPoint Process Cumulative Number Public Acceptance Societal Risk Number Offatalities
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