| Article ID: | iaor2013729 |
| Volume: | 41 |
| Issue: | 1 |
| Start Page Number: | 12 |
| End Page Number: | 18 |
| Publication Date: | Jan 2013 |
| Journal: | Operations Research Letters |
| Authors: | Hua Zhongsheng, Zhang Wei |
| Keywords: | combinatorial optimization |
We study a periodic review, dual‐sourcing inventory problem where suppliers are differentiated based on their variable and fixed costs as well as their order size constraints. Based on the preservation of quasi‐convexity and the proposed preservation of strong