Could any body tell me how can I access secondary data to test an integer programming model (in the field of a supply chain network)?

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Hemendra Lal Gunasekara

You better to read Operational Research Journal articles. Many articles are available in European Journal of Operational Research. IP has been tested for many researches. Good Luck.

Gustavo Bula

In this article "Capacitated facility location/network design problems" Daskin and Melkote show how to generate Supply Chain Design Problems.