Group 1 - The internal rate of return (IRR) is a key metric for evaluating profitability, but it can exhibit contradictory trends in financing projects due to the mathematical nature of cash flow structures [1][3] - IRR calculations depend on specific assumptions, such as initial cash outflows followed by continuous cash inflows, which contrasts with financing projects where initial cash inflows are followed by repayments [3][4] - A case study of a technology company's Series A financing shows that an IRR of 9.86% reflects financing costs rather than investment returns, similar to the principles of bond yield [4] Group 2 - Relying solely on IRR to assess financing projects has limitations, as evidenced by a negative IRR in a renewable energy company's financing plan, which overlooked hidden fees and other factors [5] - Professionals often consider adjusted IRR (MIRR), weighted average cost of capital (WACC), and cash flow coverage ratios to provide a more comprehensive evaluation [5] - A systematic analysis model developed by mature investment institutions helps in project evaluation by distinguishing project types and incorporating risk adjustment factors, reducing decision-making errors significantly [6]