According to the ordering model with quantity discount under multiple-supplier, a method was proposed based on Genetic Algorithms, and model was illustrated using a numerical example.

According to integrated supply policy, a non-linear programming model was built to analyze integrated supplier s ordering problem under the condition of multiple-supplier.

Studies on the Dynamic Version of the Economic Lot Sizing Model with Transportation Costs and Multi-suppliers;

The Research on the Inventory Model of Placing Orders with Multi-suppliers;

In a multi-echelon supply chain which consists of suppliers with finite capability,when the consuming rate of stock is fixed,proper measurement of the lead time can forecast manufacture s safety stock.