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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

Publication Year

Articles 1 - 4 of 4

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

Closed-Loop Supply Chain Network Design With Multiple Transportation Modes Under Stochastic Demand And Uncertain Carbon Tax, Ali Haddadsisakht, Sarah M. Ryan Jan 2018

Closed-Loop Supply Chain Network Design With Multiple Transportation Modes Under Stochastic Demand And Uncertain Carbon Tax, Ali Haddadsisakht, Sarah M. Ryan

Industrial and Manufacturing Systems Engineering Publications

We optimize the design of a closed-loop supply chain network that encompasses flows in both forward and reverse directions and is subject to uncertainty in demands for both new and returned products. The model also accommodates a carbon tax with tax rate uncertainty. The proposed model is a three-stage hybrid robust/stochastic program that combines probabilistic scenarios for the demands and return quantities with uncertainty sets for the carbon tax rates. The first stage decisions are facility investments, the second stage concerns the plan for distributing new and collecting returned products after realization of demands and returns, and the numbers ...


Hybrid Robust And Stochastic Optimization For Closed-Loop Supply Chain Network Design Using Accelerated Benders Decomposition, Esmaeil Keyvanshokooh, Sarah M. Ryan, Elnaz Kabir Feb 2016

Hybrid Robust And Stochastic Optimization For Closed-Loop Supply Chain Network Design Using Accelerated Benders Decomposition, Esmaeil Keyvanshokooh, Sarah M. Ryan, Elnaz Kabir

Industrial and Manufacturing Systems Engineering Publications

Environmental, social and economic concerns motivate the operation of closed-loop supply chain networks (CLSCN) in many industries. We propose a novel profit maximization model for CLSCN design as a mixed-integer linear program in which there is flexibility in covering the proportions of demand satisfied and returns collected based on the firm's policies. Our major contribution is to develop a novel hybrid robust-stochastic programming (HRSP) approach to simultaneously model two different types of uncertainties by including stochastic scenarios for transportation costs and polyhedral uncertainty sets for demands and returns. Transportation cost scenarios are generated using a Latin Hypercube Sampling method ...


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 ...