对差额投资内部收益率（△ＩＲＲ）评价方法的再认识石油勘探开发科学研究院胡月亭国家计委颁布的《建设项目经济评价方法与参数》规定，在进行方案间的优劣对比时，＂可视不同情况和具体条件分别采用差额投资内部收益率法（△ＩＲＲ）、净现值法（ＮＰＶ）、净年值法（Ａ... Re-understanding of the Method of Evaluating the Internal Rate of Return (△ IRR) of Differential Investment The Regulations and Methods for Economic Evaluation of Construction Projects promulgated by Hu Yueting, Scientific Research Institute of Petroleum Exploration and Development, State Development Planning Commission, when comparing the pros and cons of programs, According to different circumstances and specific conditions, respectively, the difference between the method of internal rate of return investment (IRR), net present value method (NPV), the net value method (A ...