Abstract
PFI projects which utilize private finance and skills in infrastructure procurements have become popular in Japan. In most se-lection of preferred bidder of the projects, economically most advantageous tender approach, which considers both bid price and service contents, is adopted. However few studies have been conducted on various types of equations for the evaluation. There-fore, the purpose of the present study is to identify issues in the PFI procurement process and propose a robust approach to improve the situation. At first, existing evaluation equations are collected in the last five years and compared through classification. Then, based on simulations with the most popular evaluation equation based on the lowest price, it is revealed the best tender may be replaced by the second depending on a price bidden by a third party. In order to overcome the problems discussed from various viewpoints including the replacement of preferred bidder, an evaluation equation which consists of the target price with the limit of lowest price is proposed and the advantages are clarified.
