logistics.pdf - This is an Accepted Manuscript of an article published by Taylor Francis in INFOR Information Systems and Operational Research on

logistics.pdf - This is an Accepted Manuscript of an...

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Collection Center Location with Equity Considerations in Reverse Logistics Networks sıl Tari a,b , Sibel A. Alumur c [email protected], [email protected] a Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, Ontario, Canada b Department of Industrial Engineering, TOBB University of Economics and Technology, S¨ g¨ut¨ oz¨u, Ankara, Turkey c Department of Management Sciences, University of Waterloo, Waterloo, Ontario, Canada Abstract In this paper, we study a collection center location problem with equity considerations within reverse logistics network design. The aim of the problem is to determine the loca- tions and the capacities of the collection centers through the planning horizon. For each time period, the decisions to be made include the location and the capacities of the collec- tion centers, the amounts of products to send from each generation point to each collection center, and the amounts of products to send from each collection center to each firm. The problem has three objectives. The first one is to minimize total cost, the second one is to ensure equity among different firms, and the third is to provide steady flow of products to each firm along the planning horizon. The problem is modeled as a multi-objective mixed integer programming formulation. An implementation of the problem in Turkey within the context of waste electrical and electronic equipment collection is presented. Sensitiv- ity analyses are conducted to observe the effect of changes in the problem parameters on the solutions. The analyses include changes in the fixed costs and container capacities, changes in the amount of supply and changes in the growth rate. In addition, the solution potential of the model and value of using a multi-period model as opposed to using a static one are investigated. Keywords: Facility Location, Equity, Multi-objective Model, WEEE. 1 Introduction Collection centers are established for collecting and storing end-of-use and end-of-life prod- ucts for proper recovery. These centers act as drop-off stations for generation points. In many countries, legislations enforce separate collection of various product categories and set recovery targets for original equipment manufacturers. Even though extended producer re- sponsibilities present in many legislations give the responsibility of recovering used products to original equipment manufacturers, governments need to establish the necessary infrastruc- ture. For example, in Denmark, Germany, and Romania the responsibility of building the necessary infrastructure for collecting Waste Electrical and Electronic Equipment (WEEE) has been given solely to municipalities. In some other countries within the European Union 1 This is an Accepted Manuscript of an article published by Taylor & Francis in INFOR: Information Systems and Operational Research on 2014-11-01, available online:
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(for example Austria, Belgium, France, Portugal, and the Netherlands), responsibilities are shared among distributors, producers, and the municipalities.
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  • Spring '19
  • Sadia Rahman

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