What is risk assessment and how does uncertainty influence it?

• A. A qualitative guess based on intuition.
• B. A formal process requiring risk acceptance.
• C. Systematic evaluation of hazards, probabilities, and impacts; uncertainty requires confidence intervals and sensitivity analysis.
• D. An estimation of economic losses only.

Answer: (C)

Risk assessment is a systematic process for understanding potential harms by identifying hazards, estimating how likely they are to occur, and evaluating the potential impacts. Uncertainty affects every step because data may be incomplete and models imperfect. To address this, risk assessments express uncertainty using quantitative or qualitative methods, often with confidence intervals or probability distributions around the risk estimates, and by examining how results change when input assumptions vary through sensitivity analysis or scenario analysis. This approach captures both what could happen and how confident we are about those estimates, helping inform better decisions. It’s not just a guess or limited to economic losses, and while decisions about action are part of risk management, the assessment itself is the systematic evaluation that explicitly incorporates uncertainty.