Jahangirfard, Majid, Hajalian, Farshad, Zamanian, Ali reza (2022). Clustering Iranian Gas Industry Managers and Ranking Their Competencies via the EFQM Excellence Model-based Evaluation with an Artificial Intelligence Approach. * Quarterly Journal of Training and Development of Human Resources*, 8(31), 51-80. 10.52547/istd.31542.8.31.51