目前视情维修是民航业采用的主要维修方式，可以使维修的有效性、经济性大幅度提高。维修决策优化模型对民航维修成本的降低和利润的提升具有显著的指导作用；归纳了视情维修的时间延迟模型、冲击模型、比例危险模型、马尔可夫决策模型等优化模型的建模方法；分析了该类模型在应用中存在的不足，并展望了其发展前景。

At present the main maintenance's manner in the civil aviation field is condition based maintenance which may improve enormously maintenance's efficiency and econmy. Maintenance optimal model concentrates the essence of condition based maintenance and plays an important role in reducing maintenance cost and raising profit of civil aviation corporation. The paper induced the establishing method of several models, such as Delay Time Model and Shock model, Proportional Hazards Model and Markov decision Model, and analyzed these models’ shortcoming in application and prospected their development.