The article analyzes different ways to measure how good an investment is. It looks at two main indicators, the internal rate of return and the modified internal rate of return, to see which one is better. By using math and graphs, the researchers found that the modified internal rate of return is more reliable than the regular one. They also showed how these indicators are connected to the profitability index of the investment project. This information can help businesses make smarter decisions about where to invest their money.