1. Department of Industrial Engineering, Applied Statistics Laboratory, Pusan National University, Busan, Korea;
2. Department of Statistics, St. Anthony’s College, Shillong, India;
3. College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing, China;
4. Department of Industrial and Systems Engineering, Gyeongsang National University, Jinju, Korea;
5. Statematics Consulting, New York, USA