维修费用是直接使用费用的一个基本组成部分。常用的计算维修费用的方法要考虑调度可靠性、部件拆卸率以及抽查假设。不过,这些方法既不直接等价于维修费用,还常常会得到与维修费用分析不同的结果。由道格拉斯飞机公司(DAC)开发的一种可在个人计算机上运行的模型,可根据运营、维修和使用手册、培训、供应商、子系统改进及更换方面的情况,预测飞机的维修费用。航班调度可靠性、 Maintenance costs are an essential part of direct usage costs. Commonly used method of calculating maintenance costs to consider the scheduling reliability, part removal rate and spot checks assumptions. However, these methods are neither directly equivalent to the maintenance costs, but often result in different results from the maintenance cost analysis. Developed by Douglas Aircraft, a PC-based model that predicts aircraft maintenance costs based on operations, maintenance and service manuals, training, vendor, subsystem improvements and replacement. Flight scheduling reliability,