关键词: 工序, 三目标, 优化, 遗传算法

Abstract: Tri-objective optimization of time，cost and quality is complex and valuable research hotspot which is of expansive practice application foreground.In order to analyze and research the complex large scale optimization problem，the integrative optimization model of time-cost-quality is set up according to the action rules and relations of three objectives.Tri-population genetic algorithm is put forward for the optimization model based on the idea of intellective stochastic search.The algorithm adopts different populations to carry out the parallel search to realize rapid optimization.Finally the methods proposed are applied to manufacturing case of airplane part，and a series of optimization results is achieved.The case application validates the correctness of the model and the availability of the algorithm.

Key words: operation, tri-objective, optimization, genetic algorithm