Risk Evaluation

Goal

Risk evaluation is the process of comparing the results of the risk analysis with risk criteria to determine whether the risk and/or its magnitude is acceptable or tolerable. Risk evaluation is used to make decisions about the significance of risks whether each specific risk should be accepted or treated. The International Risk Governance Council (2006)1)https://www.irgc.org/IMG/pdf/IRGC_WP_No_1_Risk_Governance__reprinted_version_.pdf describes the objectives of risk evaluation as a judgement on the reliability and acceptability based on balancing pros and cons, testing potential impacts on quality of life, discussing different development options for the economy and society and weighing the competing arguments and evidence claims in a balanced way2)EC (2010). Risk Assessment and Mapping Guidelines for Disaster Management. COMMISSION STAFF WORKING PAPER. Brussels, 21.12.2010 SEC(2010) 1626 final.

Preconditions

The results of the risk analysis are the starting point of the risk evaluation.

Outcomes

The outcome of this step is a selection of risks that require attention and need to be addressed in an adaptation strategy.

Guidelines

Risk criteria are the terms of reference against which the significance of a risk is evaluated. The risk criteria may include associated costs and benefits, legal requirements, socioeconomic and environmental factors, concerns of stakeholders, etc.3)EC (2010). Risk Assessment and Mapping Guidelines for Disaster Management. COMMISSION STAFF WORKING PAPER. Brussels, 21.12.2010 SEC(2010) 1626 final.

It’s a delicate task to determine which risks are acceptable and which are not. Is it, for example, acceptable to have 20 cm of water in the street for 4 hours every two years? The answer might depend on local circumstances. It would be wise to involve various city departments who are related to the risks identified in these considerations.

  • Use the list of risks and risk values from the risk analysis
  • Organise a meeting with stakeholders to discuss to what extent climate threats are acceptable and when they are not, applying risk criteria.
  • Determine the climate threats that should be addressed.

Experiences

Greater Manchester

See Risk Identification for a combined experience

Supporting tools and methods

No specific tools for determining what acceptable levels of risk are were found. Involvement of stakeholders in this step is important, the tools provided to support this might be of use.

Footnotes   [ + ]

1. https://www.irgc.org/IMG/pdf/IRGC_WP_No_1_Risk_Governance__reprinted_version_.pdf
2, 3. EC (2010). Risk Assessment and Mapping Guidelines for Disaster Management. COMMISSION STAFF WORKING PAPER. Brussels, 21.12.2010 SEC(2010) 1626 final