Research on Project Cost Optimization under Constraint of System Reliability

Construction engineering is considered as a complex network system project. By analyzing the relationship of construction costs and reliability in engineering project, a mathematical model is established to optimize the costs and genetic algorithm (GA) is used for this purpose. In the application of GA, penalty function is used to handle the constraint. Ranking based on the evaluation function and optimal conservation are adopted in the selection strategy which improve the convergence performance of GA. Finally, an example is given to verify the advantage of the new method which combines the reliability with economy in the construction. The paper is benefit for the cost optimization research.