An integrated multi-stockyard scheduling method considering the process attributes of ship blocks

To address the logistics scheduling problem of ship blocks across multiple stockyards during the shipbuilding process, this paper proposes an integrated multi-stockyard scheduling method that comprehensively considers stockyard and block process attributes, as well as block dimensions. First, an optimization model is constructed to minimize the total movement volume generated during block scheduling. Then, optimal movement strategies and methods are designed for key aspects, including block task execution sequence, target stockyard selection, task block movement paths, and block movement strategies. Finally, the proposed scheduling method is validated using block logistics data from a shipyard. The results indicate that the combination with the movement path planning strategy proposed in this study yields the optimal scheduling outcome. Moreover, the difference in the proportion of avoidable interfering block movements between the two strategies can reach up to 15.8%. These findings demonstrate that the proposed method effectively reduces inter-stockyard block movements and achieves a more efficient scheduling solution, thereby enhancing operational efficiency.