1. Industrial Engineering Department, Sebelas Maret University, Jl. Ir. Sutami 36 A, Surakarta, 57126, Indonesia
2. Department of Industrial Engineering, Bandung Institute of Technology, Bandung, Indonesia
3. Department of Transportation and Environmental Systems, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima 739-8527, Japan