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将费用和费用驱动因子均视作随机量,应用方差分量分析分离并估计出回归模型中存在的不同因素随机效应。建立了发动机大修费用估算的方差分量模型,并应用于某型发动机大修费用估算。
Considering the cost and cost drivers as random variables, we use the variance component analysis to separate and estimate the random effects of different factors existing in the regression model. The variance component model of engine overhaul cost estimation was established and applied to estimate the overhaul cost of a certain type of engine.