ABSTRACT
Based on the above issues, this paper uses the subcontractor’s serial number as variables to build the model for multiple subprojects subcontractor selection problem. The target function and constraint conditions of this new model are simple and easy to calculate. But the variables are shown in the subscript, so it cannot be solved by the classic optimization method. This paper adopts the genetic algorithm to solve this problem. To improve the solving efficiency, the paper has adopted the local tuning strategy for the individual tuning according to certain probability. To reduce the size of searching scope, the contractors of each component are ranked according to their benefit from big to small.
