1. a Department of Industrial and Systems Engineering , Auburn University, 3301 Shelby Center , AL, 36849–5346, USA
2. b Department of Mechanical, Industrial and Nuclear Engineering , University of Cincinnati , 598 Rhodes Hall, OH, 45221–0072, USA
3. c College of Medicine, University of Cincinnati , 231, Albert Sabin Way, OH, 45267, USA
4. d Department of Information Management Engineering , Korea University , Engineering Building II 635 1, 5-ga, Anam-dong, Sungbuk-gu, Seoul, South Korea