Performance Evaluation of Green Ports via C-IFS AHP: A Case Study in Turkey

Seaports are an indispensable element of world maritime trade. All activities in the world that deal with problems such as global warming and the deteriorating ecological balance should prioritize the environment and be sustainable. The concept of the green port has inherently emerged in this direction. Various indicators can be used to assess the environmental performance of ports in a country. Seaports evaluated according to these indicators can obtain the green port title and certification. Seaports with the highest environmental sustainability performance can be scored and ranked according to the weights of the indicators. Fuzzy multi-criteria decision making (MCDM) methods are useful in calculating the importance of these indicators and ranking the alternative ports. Linguistic views and responses of experts can be placed as data for the proposed MCDM with a fuzzy approach. In this study, a novel methodology including circular intuitionistic fuzzy sets (C-IFS), which is newly introduced to the literature, and Analytic Hierarchy Process (AHP) approach is proposed. It is aimed that the criteria weights and alternative ranking obtained as a result of this study contribute to the appraisement of the seaports in terms of environmental sustainability and enable the emergence of the aspects that are required to be improved.