Qualitative uncertainty assessment: a worked example

The document 'Guidance on Qualitative Uncertainty Assessment' proposes a three-step procedure for qualitative uncertainty assessment as part of environmental health impact assessments:

  1. Identification of uncertainty sources;
  2. Qualitative characterisation of uncertainty in terms of:
    • direction and magnitude of uncertainty on the results
    • knowledge about the uncertainty source
  3. Reporting of qualitative uncertainty

The purpose of the attached document is to illustrate how this guidance may be implemented in practice, by applying it to a worked example. The emphasis here is on the practical challenges.