This report provides a detailed analysis of business decision-making processes, focusing on investment appraisal techniques and performance analysis within Tesco Plc. It begins with an introduction to decision-making and its importance, followed by an application of various investment appraisal techniques such as payback period, accounting rate of return (ARR), net present value (NPV), and internal rate of return (IRR) to evaluate two machine investment options (Dysn and Texla models). The report then compares the advantages and disadvantages of each technique and recommends the most suitable machine based on the analysis. Furthermore, it examines Tesco Plc's financial performance using accounting ratios, including profitability, liquidity, and efficiency ratios, to assess the company's growth and financial health. The report also discusses the limitations of using accounting ratios and identifies factors impacting Tesco's performance, concluding with recommendations based on the findings.