ABSTRACT
In risk characterization, you provide the results, given the data and assumptions. The users of your assessment also need to know how confident you are and how confident they can be if they use your results. The unknowns are the things that are left out. You should be transparent about the uncertainties that come from not knowing those things. With greater confidence, the concern about uncertainties is diminished. The call to characterize both confidence and uncertainty arose in risk assessment, but is also applicable to other types of assessments.
