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U.S. Department of Health and Human Services

Animal & Veterinary

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Safety & Health

Risk-Ranking Model

Risk Ranking Model

Comments by Phares O. Okelo
For the 5th Animal Feed Safety System Public Meeting
May 14, 2008
Gaithersburg, Maryland
AFSS Public Meeting - Risk Ranking Model - Slide 1

Slide 2

Model Components

  • Risk Score
  • Health Consequence Score
  • Exposure Score
AFSS Public Meeting - Risk Ranking Model - Slide 2

Slide 3

Scales and Weights (Log transformation)

  • Trends of biological phenomena are exponential (increments multiples of 10)
  • Log converts exponential trends into linear trends
  • Log condenses sparse data points
  • Log disperses dense data points
AFSS Public Meeting - Risk Ranking Model - Slide 3

Slide 4

Health Consequence Score

Risk Score

  • Health Consequence Score
    • Severity of Illness Score
    • Likelihood of Illness Score
  • Exposure Score
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