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click B callback "See Section 7.1."
click C callback "See Section 17 regarding reporting."
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Uncertainty analysis for standardised assessments
Introduction to standardised assessments
The Guidance on uncertainty analysis is designed for different types of assessment.
A standard assessment follows a procedure that specifies every step of assessment for a specified class or products or problems, and is accepted by assessors and decision-makers as providing an appropriate basis for decision-making.
A standard assessment is judged (implicitly or explicitly) to be sufficiently conservative, providing adequate cover for the standard source of uncertainty affecting the assessment.
For example, uncertainties due to within and between species differences in toxicity are often addressed by a default factor of 100 in chemical risk assessment.
Most standardised procedures involve deterministic calculations using a combination of standard study data, default assessment factors and default values.
Standard sources of uncertainty should in principle have been identified when developing a standard procedure, together with criteria to evaluate when uncertainties are standard.
An uncertainty analysis for a standard procedure starts with Checking for non-standard uncertainties.
This is done by checking every part of assessment for non-standard uncertainties and listing those identified.
If no non-standard uncertainties are identified - the assessors should document in the opinion that non-standard uncertainties were checked for and none were identified. In this case, no further analysis of the uncertainties is needed.
If one or more non-standard uncertainties are identified, their impact on the final conclusions will have to be assessed.