Research Article

Modeling Multilevel Supplier Selection Problem Based on Weighted-Directed Network and Its Solution

Table 2

The solutions of tabu search algorithm before and after improvement.

Network scaleAlgorithmMinimumMaximumAverageVarianceConvergence frequency

30 nodesTabu search443.43554.3505.4648.88375.00
Dynamic programming- tabu search436.5532.248119.39375.00