ABSTRACT
Risk is commonly associated with a hazardous possibility, uncertain, but foreseeable, which threat a person or a thing with a damage. This definition, however, does not cover aspects of the consequences possibilities of a hazard, both on the nature of the consequence and the importance or usefulness of such.According to Fayerweather et al. (1999) to characterize and quantify uncertain can help decision-makers to make safer decisions when faced with some actions to mitigate risks. Keeney (1992) points out that the identification of the values affected by a decision should be the starting point for developing a careful decision on risk. Such values are used to create objectives and measures of performance to that decision, in order to define the technical aspects necessary to compare or assist in the creation of more structured alternatives and serve as a base for qualitative and quantitative assessments (Keeney, 1992; McDaniels et al., 2006).
