Green supplier selection in defense industry sector with multi-criteria decision-making methods

Awareness towards green supply chain management has increased rapidly in recent years and studies in this field have also intensified. It has been evaluated that the adoption of environmentally focused approaches in the defense industry, where export rates increase every year, has the potential to facilitate exports. The purpose of the study is to emphasize the importance of green procurement practices and contribute to increasing awareness in the sector by conducting an application on green supplier selection for an unmanned aerial vehicle jammer system. Firstly, with the help of literature review and expert opinions 5 main criteria and 20 sub-criteria have been determined and then it has been aimed to select the most suitable supplier among the four candidates. In the second stage, the weights of criteria have been calculated with interval-valued Pythagorean fuzzy analytical hierarchy process (IVPF-AHP). Eventually, the suppliers have been evaluated and candidates have been ranked with interval- valued technique for order preference by similarity to ideal solution (IVPF-TOPSIS). Finally, via the sensitivity analysis and comparative analysis the robustness of the proposed decision making approach was verified.