Based on the analyzing of costs sample of equipment, set up prediction model of economic life of equipment, considering the middle-linear regression method and period value of costs.

通过对设备费用样本的分析，采用了中间线性回归方法和考虑了货币的时间价值，建立了符合缺省数据费用样本的设备经济寿命预测模型。

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It introduces the theories and calculating method of abrasion as well as economic life for equipment. And the overhaul, renew, Technological transformation for the decision of equipment renewing.

文中介绍了设备的磨损及经济寿命的理论和计算方法以及设备的大维修、更换、技术改造等更新方法的决策。

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The generic method to determine equipment update occasion is the model of applying conception of equipment natural life, or technical life, or economic life in isolation.

常用的确定装备更新时机的方法是孤立地应用装备的自然寿命，或者技术寿命，或者经济寿命概念的模型。

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He said IRS guidelines generally dictate that businesses must depreciate equipment purchases over the economic life of the property.

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