Precast production scheduling is a key issue in prefabricated construction. Process connection and blocking are two characteristics of the flowshop production of precast components; however, they have received little attention in research on production scheduling, which may prevent actual production from following optimized scheduling schemes. In this study, an optimization model for the production scheduling of precast components was established considering process connection and blocking for minimizing the total penalty cost of earliness and tardiness. A solution for the model was designed and applied to a practical case for validation. The results indicate that the improved scheduling scheme can reduce the penalty cost and facilitate on-time delivery of precast components under two scenarios: tardiness partially allowed and no tardiness allowed. The proposed model and method can help precast plants to improve efficiency and reduce cost in addition to enhancing the practicality of precast production scheduling schemes.

预制生产计划是预制建筑中的关键问题。过程连接和阻塞是预制件流水车间生产的两个特征；但是，他们对生产调度的研究很少受到关注，这可能会阻止实际生产遵循优化的调度方案。在这项研究中，建立了一个预制模型的生产调度的优化模型，该模型考虑了过程的连接和阻塞，以最大程度地减少早期和拖延的总惩罚成本。设计了模型的解决方案，并将其应用于实际案例进行验证。结果表明，改进的调度方案可以降低惩罚成本，并在两种情况下允许预制组件按时交付：部分拖延和不允许拖延。