本研究主要探討重力鑄造之參數最佳化。研究方法有田口實驗搭配因子模型、均勻實驗搭配迴歸模型、 田口與均勻實驗搭配克利金代理模型，用模流分析驗證最佳化方法。改善之製程參數有澆注溫度、模具溫度、翻轉速度等3因子。研究流程如下，第一，以規劃3水平3因子，使用田口實驗直交表L9(33)表，因子模型最佳化參數，進行模流分析驗證。第二，規劃均勻實驗設計表U9(93)，迴歸模型最佳化參數，模流分析驗證。第三，根據田口與均勻實驗所驗證的20組數據透過克利金代理模型，模流分析驗證最佳化參數。第四，以模流分析軟體C3P Geo-Designer模流分析之成品鑄縮0.3mm分佈位置，成品鑄縮0.3mm體積最小值，為最佳化參數之代理模型。

Under the policy of national defense autonomy, the Brave Eagle project pre-planned in 2026 to deliver the Air Force to transfer the current AT-3 flight training simulator, but the AT-3 flight training simulator has been used for more than 27 years, with the accumulation of simulator operating hours, AT-3 Flight Simulator are facing the problems in terms of increased frequency of failures and diminishing manufacturing sources and material shortages. Therefore, not only is the maintenance operation becoming increasingly severe, but also it is afraid to affect the smooth connection of the Brave Eagle project. The study applies system dynamics theory to analyze the maintenance system in order to find out critical variables and their casual relationships. Thus a system dynamics model is then constructed for policy analysis and simulations. Further, how the availability and cost by different policies will be discussed. The related research results and management implications will also be discussed in the paper.