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The plurality of approaches has the potential to improve knowledge, as different methods may deal with certain issues more effectively. Nevertheless, certain methodological challenges such as the quantification of adaptive capacities and uncertainties remain (BMU, 2014). The frequent use of literature review and expert appraisals as a substitute of the ore challenging quantitative approaches perhaps suggests that more effort should be placed on the latter. Additionally, although the establishment of a rigid and unchangeable framework would not provide much help, developing   comprehensive and flexible guidelines for undertaking risk or vulnerability assessments can support countries, particularly the ones that are in an early stage in the adaptation policy, (e.g. WHO, 2013).