This report delves into managerial finance, evaluating financial decision-making from both investor and management perspectives. It comprises two portfolios: the first focuses on analyzing the financial performance, position, and investment potential of Sainsbury PLC and Tesco PLC using ratio analysis, including current, quick, net profit margin, gross profit margin, gearing, P/E, EPS, ROCE, inventory turnover, and dividend payout ratios. The analysis covers both 2018 and 2019 data, with graphical representations and comparisons. The report also offers recommendations for improving the financial performance of poorly performing businesses and discusses the limitations of relying solely on financial ratios. The second portfolio explores capital investment appraisal techniques and their limitations in long-term decision-making. The report concludes by synthesizing the findings and referencing relevant financial literature.