Tetsuya KAMIJO （JICA Research Institute, Japan International Cooperation Agency ）
Prior research suggested that principal component analysis was effective as an alternative assessment technique in terms of clarity of reasons for selecting the most suitable option, low arbitrariness, verification of analysis results and easiness of technique. This study aimed to apply this analysis to the 15 cases of alternative assessment that the Japan International Cooperation Agency prepared, in order to verify the adequacy of a regular assessment methodology. Some options selected were the same as options selected by regular techniques and other options were different. The reasons would be criteria setting with a high correlation, arbitrary weighting and evaluation, and summation using scores not normalized. The principal component analysis could deal with the above-mentioned problems and be a recommended alternative assessment technique and a preferable number of alternatives and criteria could be six and ten at the minimum. Finally, this paper proposed to use this analysis as a second assessment technique to verify the result of an alternative analysis with summation using normalized scores. Further case studies are required to find an appropriate alternative assessment methodology including public involvement and establishing correct criteria and right alternatives.
alternative assessment, principal component analysis, case studies, Japan International Cooperation Agency, public involvement