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Sustainability in supplier selection and order allocation: combining integer variables with Markowitz portfolio theory

Kellner, Florian ; Utz, Sebastian


This research presents a decision support methodology for the multi-criteria supplier selection and order allocation problem. The proposed approach supports purchasing managers in assembling mid-term supplier portfolios while making them aware of the trade-offs between the supplier sustainability, the purchasing costs, and the overall supply risk. First, we propose a multi-objective optimization ...


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