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Confidence Rating of Marine Eutrophication Assessments. CONFIRM Workshop, Copenhagen 6 th March 2009. Ciarán Murray, DHI. Confidence Rating. Based on scoring of indicators RefCon, AcDev, and AcStat, are scored with respect to: extraordinary quality
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Confidence Rating of Marine Eutrophication Assessments CONFIRM Workshop, Copenhagen 6thMarch 2009 Ciarán Murray, DHI
Confidence Rating • Based on scoring of indicators • RefCon, AcDev, and AcStat, are scored with respect to: • extraordinary quality • acceptable quality ‘indicator confidence’ • poor quality • ‘Indicator confidence’ is combined per quality element • Quality elements are combined into a interim ’confidence assessment’: • Class I = 100-75% = extraordinary quality • Class II = 75-50% = acceptable quality • Class III = 50-0% = poor quality
Indicator Confidence From scores to indicator confidence rating
Quality Element Confidence From Indicator to Quality Element confidence rating …including Indicator weighting
Overall Confidence Assessment Confidence for Quality Elements combined To give overall assessment • Class I = 100-75% = extraordinary quality • Class II = 75-50% = acceptable quality • Class III = 50-0% = poor quality
Overall Confidence Assessment Another example… • Class I = 100-75% = extraordinary quality • Class II = 75-50% = acceptable quality • Class III = 50-0% = poor quality
Only 1 indicator? A quality element with only 1 indicator has a reduced confidence rating. Reduction -25%
Only 1 Quality Element With only 1 quality element the overall confidence rating is reduced. Reduction -50%
Confidence Rating • …any questions? Reference Conditions (RefCon) Confidence Score Acceptable Deviation (AcDev) Confidence Score Actual Status (AcStat) Confidence Score Indicator Confidence Rating (Ind_Conf) Quality Element Confidence Rating (QE_Conf) Final Confidence Rating