Table 5.

Rating scale for level of uncertainty.

Description	Definition
Low	Strong level of confidence in the assessment. Scientific evidence and/or previous experience of similar situations is available.
Medium	Moderate level of confidence in the assessment. Some scientific evidence and/or previous experience of somewhat similar situations is available.
High	Limited level of confidence in the assessment. Scientific evidence and previous experience is lacking; high degree of variation across the scenarios considered; high potential for variability in the outcomes.