Concession Candidates Selection Model for Infrastructure projects Using Interval Number and Grey Relational Analysis: A Social-Cost-Based Perspective

摘要

Social cost is a factor that has been widely considered in social and economic development activities. For any infrastructure projects that has a bearing on the general public, great attention should be paid to any potential social negative effects arising from the mishap thereof. This paper presents a set of social-cost-based attributes for bid evaluation of BOT infrastructure project concession candidates. In case of known weighted attributes, the bid evaluation committee can develop a model for bid evaluation of concession candidates based on interval numbers and grey relational analysis, if it faces uncertainties concerning the attributes themselves and the owner's preference for concession candidates. The ranking of concession candidates can be done by obtaining grey correlation for interval numbers through the distance between interval numbers. This social-cost-based model is set to contribute to less social costs by forcing a concession candidate to work out a more reasonable operational scheme. Meanwhile, uncertain information for decision making is offset by interval numbers, leading to more practical evaluation results.