1. Discuss reasons why a safety practitioner might want to use quantitative analysis of risks rather than a simpler qualitative analysis. Provide examples that illustrate your point.
2. Consider a fault tree with an AND gate under the top event. The first tier contains four failure events with respective failure probabilities of 0.005, 0.002, 0.01, and 0.0001.
Book risk management
a. What equation should you use to compute the probability of the top event?
b. Using the equation, what numerical value do you get for the top event probability?
c. For the top event, what is the probability of the complimentary event (i.e., success probability)?