Abstract
To beforehand evaluate information investment, various kinds of economic evaluation indices have been applied similarly to the case of machinery investment. But, it has been tried to evaluate the information investment as an independent project unconnected to machinery investments. For that reason, the standard evaluation method has not been established due to the difficulty of quantitative evaluation on the value added. Then, profitability index and annual net present value rate of return on machinery investment and information investment are calculated by fitting profitability index or net present value ratio to the five years record of discounted cash flow. The both indices can be used to beforehand evaluate information investment and to build the management cycle of the investment. Especially, the standard deviation of profitability index records can be applied to calculate the real options of the concerned investment.
