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Evaluating risks through numbers-although an inevitable stage of risk management-can be seriously problematic, especially when marginalized groups of risks turn out to be significant, for example, to the lives of people. While it questions the effectiveness of the traditional approach to risk scoring, the literature provides no alternative satisfying all the criteria stressed by the critics. In fact, different dimensions of uncertainty, along which a risk can be viewed, entail different quantifications. Most previous work, however, concentrates on supposedly all-purpose solutions that are often justified or promoted over others by reasons not necessarily applicable; little information is available on how to best select the needed scoring approach. This research investigates the issues involved in constructing a risk factor formula that is more consistent with the nature of the project and its goals. Major concerns addressed in the …