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Operations Research, Systems Engineering and Industrial Engineering Commons

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Series

Iowa State University

Industrial Engineering

Closed-loop supply chain

2014

Articles 1 - 2 of 2

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

Robust Design Of A Closed-Loop Supply Chain Network For Uncertain Carbon Regulations And Random Product Flows, Nan Gao, Sarah M. Ryan Jun 2014

Robust Design Of A Closed-Loop Supply Chain Network For Uncertain Carbon Regulations And Random Product Flows, Nan Gao, Sarah M. Ryan

Industrial and Manufacturing Systems Engineering Publications

This paper addresses a multi-period capacitated closed-loop supply chain (CLSC) network design problem subject to uncertainties in the demands and returns as well as the potential carbon emission regulations. Two promising regulatory policy settings are considered: namely, (a) a carbon cap and trade system, or (b) a tax on the amount of carbon emissions. A traditional CLSC network design model using stochastic programming is extended to integrate robust optimization to account for regulations of the carbon emissions caused by transportation. We propose a hybrid model to account for both regulatory policies and derive tractable robust counterparts under box and ellipsoidal ...


Joint Optimization Of Asset And Inventory Management In A Product–Service System, Xiang Wu, Sarah M. Ryan Jan 2014

Joint Optimization Of Asset And Inventory Management In A Product–Service System, Xiang Wu, Sarah M. Ryan

Industrial and Manufacturing Systems Engineering Publications

We propose an integrated model of the asset management decisions for a fleet of identical product units and the inventory management decisions for a closed-loop supply chain in the context of a product-service system, in which the two types of decisions are closely coupled. A joint optimization technique is developed to obtain the parameters of the operational policy for the integrated model that minimize the long run average cost rate. A numerical example is provided to illustrate the computational procedures. In addition, the effect of a simplifying assumption that the replaced products have no quality difference is evaluated and the ...