| The internal rate of return is one of the main indexes of the project evaluation now, when using this index, need to make the exact estimate of the cash flow, but in the actual business activities, the net cash flow is usually uncertain, and often cannot be accurately estimated. Based on this, considering the IRR application situation under the cash flow is the probability ranking state, is interval number state and is meeting specific probability distributions, to make it more close to the reality, in order to improve the accuracy of project evaluation. |