7 accepted papers
Many autonomous mobile robot path planning scenarios require servicing grouped delivery points. Such clustered routing problems are naturally formulated as the clustered traveling salesman problem (CluTSP), which comprises two interdependent subproblems: global inter-cluster routing to determine the
Under the shift toward Industry 4.0, mass-customized manufacturing systems have introduced complex scheduling problems, such as the Flexible Job Shop Scheduling Problem (FJSSP). Recent Deep Reinforcement Learning (DRL)-based heuristics have shown promise, yet existing methods often suffer from two k
Many scheduling problems, especially for automated manufacturing systems, have been addressed with a timed Petri net (TPN) by developing optimal or heuristic algorithms based on it. However, most of them have focused on cyclic scheduling, in which a firing sequence of transitions in a TPN is repeate
Reinforcement Learning (RL) has shown promising results in solving Job Scheduling Problems (JSPs), automatically deriving powerful dispatching rules from data without relying on expert knowledge. However, most RL-based methods train only a single decision-maker, which limits exploration capability a…
This paper tackles the dynamic crane scheduling problem in a steel coil warehouse, involving tasks such as coil storage, retrieval, and shuffling. Tasks arrive dynamically with precedence relations, while multiple cranes share a track, necessitating collision avoidance. We aim to minimize the averag…
One of main operational issues in assembly lines is to assign tasks and workers to workstations so that the maximum productivity can be achieved. Many previous studies have addressed this problem, but most of them have assumed one worker in each workstation or multiple workers with the same skill le
This paper analyzes the completion time of automated manufacturing systems, especially a dual-armed cluster tool, equipped with parallel processing modules (PMs). Cluster tools, which consist of multiple PMs, a transport robot, and loadlocks where wafer lots are loaded and unloaded, perform semicond…