“…Kim and Kim (2003) considered the dispatching of a single crane to minimize the total gantry time. Several different strategies were pursued to optimize YC deployment, e.g., minimizing the total unfinished jobs (Zhang, Yw, Liu, & Linn, 2002), minimizing the total jobs overflow (Linn & Zhang, 2003), and minimizing the average vehicle job waiting time for YC service (Huang, Guo, & Lau, 2011). Most of these studies on YC operational management, whether deployment or scheduling, are devoted to promoting operational efficiency.…”