In this work, simultaneous scheduling and vessel routing problem of pipeless plants is addressed with different layouts of units/stations. A general framework is presented for optimization of pipeless plants, which includes guidelines for state-task-network development covering issues such as when to consider vessels as states and how to handle vessel routing. The proposed formulation has been illustrated using two case studies drawn from the literature. For the demonstration of the proposed simultaneous approach, three different layouts: linear, herringbone, and circular, are considered in example 1 with three vessels. The herringbone layout results in better makespan value, as expected. The second case study is relatively large with six vessels and is solved for the herringbone layout for the different number of vessels.

中文翻译：

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不同布局的无管工厂的同时调度和路由

在这项工作中，用不同的单元/站点布局解决了无管工厂的同时调度和船只路由问题。提出了用于优化无管工厂的通用框架，其中包括用于状态任务网络开发的指南，涉及诸如何时将船舶视为州以及如何处理船舶路线等问题。使用从文献中得出的两个案例研究说明了拟议的配方。为了演示所提出的同时进行的方法，在示例1中考虑了具有三个容器的三种不同布局：线性，人字形和圆形。如预期的那样，人字形布局可带来更好的制造期价值。第二个案例研究相对较大，有六个船只，并且针对不同数量的船只解决了人字形布局问题。