Risk Assessment and Management. Getting the Measure of Risk. Having understood the potential accident sequences associated with a hazard (e.g. using ETA) … Next step is to determine the severity of the credible accidents identified
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Next, estimate (predict) accident probability
Reasoning about risk
Risk(Hazard H1) > Risk(Hazard H2)
Start with determination of severity
Adapted from ARP 4761
For civil aerospace, severity-related objectives are set in
Acceptable Risk is fixed and predetermined
Where does acceptable risk come from?
ALARP = As Low As Reasonably Practicable
Appropriate Decision Authority (From MIL-STD-882C)