Abstract Assembly lines are mass production systems which are significant in the industrial production of both standard and customised products. Currently, industrial companies offer several products and it is common for an assembly system to have multiple assembly lines. Parallel assembly lines are multiple lines located in such a way as to allow improvements in the system’s efficiency through the use of common resources. In recent years several research studies have been made on parallel assembly lines. In this paper, we survey the parallel assembly lines balancing problem (PALBP) studies. Moreover, a classification scheme is provided to ease understanding. Finally, the main gaps in the literature are described and future research directions are presented.

中文翻译：

---

平行装配线平衡问题综述

摘要 装配线是大规模生产系统，在标准产品和定制产品的工业生产中都具有重要意义。目前，工业公司提供多种产品，并且装配系统具有多条装配线是很常见的。平行装配线是多条生产线，其布置方式可以通过使用公共资源来提高系统效率。近年来，对平行装配线进行了多项研究。在本文中，我们调查了平行装配线平衡问题 (PALBP) 的研究。此外，还提供了分类方案以方便理解。最后，描述了文献中的主要差距，并提出了未来的研究方向。