An unequal time interval forecasting model of GM (1, 1) is established according to the grey theory in the present paper, which can be modified using the residual error GM (1, 1) model.
运用灰色理论建立了软基沉降的不等时距预测GM(1, 1)模型，并可用残差的GM(1, 1)模型对其进行修正。
Estimation of parameters are very important in grey GM (1, 1) forecasting model.
在灰色g(1,1)预测模型中，参数的估计是非常重要的。
The number of product trouble satisfies the properties like that. We improve traditional GM(1,1) model by supplying residual error and applying the improved model for forecasting of product trouble.
采用补充残差和加权平均的方法改进了传统的GM（1，1）模型，并将改进后的模型应用于产品故障数的预测。
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