## 7 Conclusions and Future Work  
In this research, international dispute resolution alternatives are evaluated based on different evaluation criteria determined through a literature review and three experts, who each have at least a doctorate degree from their own majors. Based on the determined criteria and alternatives, a case study is conducted by three experts from international law, international relations, and political science departments. The international dispute resolution methodologies are assumed as alternatives, which are evaluated and ranked by applying the proposed IVT2F-TOPSIS method. The results of the proposed IVT2F-TOPSIS method are controlled by the experts to check whether the results are accurate or not. Therefore, this research presents different rankings under different criteria weights by taking the current situation and needs of international dispute resolution methods into consideration. When applying the proposed IVT2F-TOPSIS, the eight alternative international dispute resolution methods are defined as (1) negotiations (\(A_{1}\)), (2) good offices (\(A_{2}\)), (3) mediation (\(A_{3}\)), (4) international inquiry (\(A_{4}\)), (5) conciliation (\(A_{5}\)), (6) resolution through international organizations (\(A_{6}\)), (7) arbitration (\(A_{7}\)), and (8) jurisdiction (\(A_{8}\)). On the other hand, the evaluation criteria, such as (1) cost-efficiency, (2) duration, (3) result orientation, (4) impartiality, (5) binding nature, and (6) generalizability, are considered. The importance level of alternatives is ranked by applying IVT2F-TOPSIS under the determined evaluation criteria. The experimental results showed that the most appropriate international dispute resolution options were based on different criteria weights. According to three expert evaluations in terms of the criteria weights and alternatives under the determined criteria, the ranking of the international dispute alternatives is sorted based on the importance level as follows: \(A_{8}>A_{7}>A_{6}>A_{5}>A_{3}>A_{4}>A_{2}>A_{1}\). In addition, the results of the proposed methodology show that decision-makers could benefit from various environments where the conditions are completely different. Furthermore, the flexibility of the IVT2F-TOPSIS method allows for adaptation to different cultural contexts and legal systems, making it a valuable tool for decision-makers operating in diverse settings. By considering a wide range of perspectives, the methodology can provide an opportunity for international law experts or policy-maker practitioners to provide comprehensive and balanced solutions to complex problems. In real life, evaluations of the alternatives and criteria are not always possible to define with crisp numbers because real-life situations are commonly in vague or stochastic environments. In this context, fuzzy sets enable the effective conversion of the uncertainty and ambiguity in the opinions of experts. Fuzzy sets allow for a more flexible and realistic representation of uncertain information, enabling decision-makers to better capture the complexity of real-world situations. By incorporating fuzzy logic into decision-making processes, organizations can make more informed and effective choices in ambiguous environments. The results of sensitivity analysis showed that the proposed IVT2F-TOPSIS method served as a useful way to handle the fuzzy multiple-attribute group decision-making problems more flexibly and comprehensively. Additionally, the sensitivity analysis is applied to analyze the sensitivity of the proposed methodology under different criteria weights. The results imply how sensitive or robust the rankings are to criteria weight changes. The proposed IVT2F-TOPSIS approach converts experts' linguistic evaluations into numerical outputs. Future studies could explore additional criteria beyond cost-effectiveness, duration, results orientation, impartiality, binding nature, and generalizability. The possible additional criteria could be suggested as transparency, cultural impact, and public acceptance.