净现值(ＮＰＶ)与内部报酬率(ＩＲＲ)是进行投资项目评价的两项主要经济指标,其共同特点是对投资项目现金流量的时间进行考虑,他们的计算公式从形式上看是一致的。然而,应用这两项评价指标不是总能得到一致的评价结论,也就不可避免地要在这两种评价指标中作出选择,为此引出了这 The net present value (NPV) and internal rate of return (IRR) are the two major economic indicators for the evaluation of an investment project. The common characteristic is that the time of the cash flow of an investment project is taken into account and their calculation formula is formally the same . However, the application of these two evaluation indicators is not always the same conclusion of the evaluation, it is inevitable to choose between the two evaluation indicators, which leads to this