In the Outcome/Service Delivery step, users integrate their assessments of potential impact and adaptive capacity to arrive at a rating for overall project risk.
Subsector differentiation: This step is organized by subsector, for several reasons. First, each subsector is subject to a different level of potential impact, so rating them separately enables differentiation. Second, the activities of each subsector may have different levels of influence on the overall project outcome. Activities in one subsector may be relatively tangential, or secondary, whereas the activities or elements in another subsector might be crucial to the project.
For example, suppose a project involves a major investment in a waste water transport system and treatment plant in an urban area, and that this is supplemented by small, on-site septic systems for locations that cannot be reached by the central system. While this project involves an investment in on-site sanitation, impacts from climate and geophysical hazards on the main waste water transport and treatment investments are likely to affect the project outcome more strongly than impacts on the septic systems.
Risk ratings: The risk ratings are done separately for climatic conditions in the Historical/Current and Future time frames to account for possible changes in potential impact over time. For example, reductions in water quality as a result of extreme runoff may become more severe as heavy rainfall events become more intense or frequent.
The rating scale for project risk looks like this:
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Insufficient Understanding
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No Risk
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Low Risk
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Moderate Risk
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High Risk
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Reminder: The final results of the screening, presented in the summary report, are designed to flag potential impacts and risks to projects from climate and geophysical hazards. These risk assessments may need closer attention during project preparation through further studies, consultation, and dialogue. The screening results are not sufficient to serve as the basis for decisions regarding detailed project design.