If the PLL for a fire event is 0.2 and the likelihood is 0.5, what would be the risk contribution?

If the PLL for a fire event is 0.2 and the likelihood is 0.5, what would be the risk contribution?

• A. 0.1 per year
• B. 0.01 per year
• C. 2.0 per year
• D. 0.15 per year

Answer: (A)

To determine the risk contribution, you multiply the Probability of Loss (PLL) for the fire event by the likelihood of that event occurring. In this scenario, the PLL is 0.2, which represents the probability of a fire event occurring, and the likelihood is given as 0.5, which reflects the chances or frequency of that event happening. The calculation is as follows: Risk Contribution = PLL * Likelihood Risk Contribution = 0.2 * 0.5 = 0.1 This result indicates that the risk contribution from the fire event is 0.1 per year. Understanding this formula is vital in risk assessment within functional safety, allowing teams to evaluate and prioritize safety measures effectively. The other choices do not match the calculated risk contribution based on the provided values, confirming that the option representing 0.1 per year is indeed the correct one.

To determine the risk contribution, you multiply the Probability of Loss (PLL) for the fire event by the likelihood of that event occurring. In this scenario, the PLL is 0.2, which represents the probability of a fire event occurring, and the likelihood is given as 0.5, which reflects the chances or frequency of that event happening.

The calculation is as follows:

Risk Contribution = PLL * Likelihood

Risk Contribution = 0.2 * 0.5 = 0.1

This result indicates that the risk contribution from the fire event is 0.1 per year. Understanding this formula is vital in risk assessment within functional safety, allowing teams to evaluate and prioritize safety measures effectively. The other choices do not match the calculated risk contribution based on the provided values, confirming that the option representing 0.1 per year is indeed the correct one.