Hale Gonce Kocken is an Associate Professor in the Department of Mathematical Engineering at the Yildiz Technical University (YTU), Istanbul, Turkey. She has been a faculty member of YTU since 2004. She completed her Ph.D. entitled “Fuzzy approaches to network analysis” in Applied Mathematics (2011) from the same department. Her current area of research is mathematical Programming, supply chain management and some related Operational Research subjects in multi criteria and fuzzy environments. Additionally, she has doing research about multi criteria decision making methods with type -2 fuzzy numbers and also fractional programming.