Risk analysis typically does not require a lot of information.  

Safety has been the primary focus of public policies in the past.

Uncertainty is the reason for risk analysis.  

The population of a city has a true value.  

Risk communicators only need to understand the output of risk analysis, not the input or the work of risk assessors and managers.  

It is the risk manager’s job to decide how to handle the uncertainty that remains in decision making.  

Once a problems and opportunities statement is available, it is easy to identify the risks that need to be addressed in the decision-making process.  

Variability: Variability refers to true differences in attributes due to collection or diversity. Variability is usually not reducible by further measurement or study, although it can be better characterized.  

Risk characterization is an important step in risk management that can be done qualitatively or quantitatively, with the latter being preferred because it provides numerical estimates of risk.    

Uncertainty is not a common factor in modern decision making.