Design and Operation of Reverse Production Systems

小行星9800198 该补助金资助的研究涉及制定一种方法，用于对回收和再处理旧产品的生产和物流系统做出战略决策。 该方法考虑了回收任务，材料的收集，分类和分离以及再制造任务，如材料复合和解聚。 每个任务可能有几个不同的实现，并可以位于不同的地点，通过各种运输方式连接。这导致了回收网络的上层结构，使用优化方法可以从中找到具有最低年化总成本的网络。该方法将以混合整数线性规划方法为基础，并将包括在万维网上实施的一个接口，使该工具的潜在用户能够访问和修改模型，以进行个案研究和审查解决办法。 如果成功的话，这项研究的结果将提供一种方法来设计具有成本效益的逆向生产系统，并提高对回收一系列产品的系统的相似性和差异性的理解。最佳解决方案将包括哪些网站打开，什么任务分配给网站和多少材料应该通过什么方式运送。该公式具有多周期结构，因此网络可以随着时间的推移以最佳方式扩展。该方法将使用几种产品进行测试，从地毯开始，其中存在小规模的网络。其他产品将包括造纸机卷筒纸和电子消费品。该工具将提供模拟各种回收和后处理战略和技术的能力。 这将量化收集量和技术的不确定性对那些试图投资回收基础设施的网络结构的影响。

9800198Realff The research funded by this grant concerns the development of an approach for making strategic decisions about production and logistics systems for recovering and reprocessing used products. The method considers recycling tasks, collection, sortation and separation of materials and remanufacturing tasks such as material compounding and depolymerization. Each task may have several different implementations and can be located at different sites connected by various modes of transportation. This results in a superstructure of recycling networks from which the one with lowest overall annualized cost will be found using an optimization method. The approach will be based on mixed integer linear programming methodology and will include an interface implemented on the World Wide Web to allow potential users of the tool to access and modify models to run case studies and examine solutions. If successful, the results of this research will provide a way to design cost effective reverse production systems and improve the understanding of the similarities and differences in systems for recovering a range of products. The optimal solution will consist of which sites to open, what tasks to allocate to the sites and how much material should be shipped by what mode. The formulation has a multi-period structure so that the network can be expanded in an optimal fashion over time. The method will be tested using several products starting with carpet for which a small scale network exists. Other products will include paper machine webs and electronic consumer goods. The tool will provide the capability of simulating a wide range of recycling and reprocessing strategies and technologies. This will quantify the effects of uncertainty in collection volumes and technologies on the structure of the network for those trying to make investments in recycling infrastructure.