The Climate Vulnerability Index (CVI) is based on a framework which incorporates a wide range of issues. It is a holistic methodology for water resources evaluation in keeping with the sustainable livelihoods approach used by many donor organisations to evaluate development progress. The scores of the index range on a scale of 0 to 100, with the total being generated as a weighted average of six major components. Each of the components is also scored from 0 to 100. Values representing the CVI components in the present are determined on the basis of quantitative and qualitative data, and potential future changes are assessed using scenarios of climate and other forms of global change.