Session 21 Power Point

Risk Acceptability Safe does not necessarily mean ‘free from risk’

Most Risks have Associated Benefits

“Acceptable risk is the risk associated with the best of available alternatives, not with the best of alternatives which we would hope to have available.” Source: Derby, Stephen L., and Ralph L. Keeney, 1981.

Factors that Determine Risk Acceptability ,[object Object],[object Object],[object Object]

Injustices ,[object Object],[object Object],[object Object]

Risk Acceptability Assessment Methods ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Derby and Keeney’s 5 Steps ,[object Object],[object Object],[object Object],[object Object],[object Object],Source: Derby and Keeney, 1981

Example A 0 RISK 0 COST ,[object Object],[object Object],*M Source: Derby, Stephen L., Ralph L. Keeney. 1981. Risk Analysis: Understanding “How Safe Is Safe Enough?” Risk Analysis. V.1. No.3. Pp.217-224.

Example B 0 RISK 0 COST ,[object Object],[object Object],Minimum Risk Minimum Cost Source: Derby, Stephen L., Ralph L. Keeney. 1981. Risk Analysis: Understanding “How Safe Is Safe Enough?” Risk Analysis. V.1. No.3. Pp.217-224.

Example C 0 RISK 0 COST ,[object Object],[object Object],*M * Source: Derby, Stephen L., Ralph L. Keeney. 1981. Risk Analysis: Understanding “How Safe Is Safe Enough?” Risk Analysis. V.1. No.3. Pp.217-224.

Example D 0 RISK 0 COST ,[object Object],[object Object],Case 1 Case 2 Source: Derby, Stephen L., Ralph L. Keeney. 1981. Risk Analysis: Understanding “How Safe Is Safe Enough?” Risk Analysis. V.1. No.3. Pp.217-224.

Session 21 Power Point

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Session 21 Power Point