This essay analyzes the business decision-making process for DDK Plc, a UK-based company considering investments in belts and trainers. It utilizes the Net Present Value (NPV) and Payback Period methods to evaluate two potential projects, providing detailed calculations and interpretations. The analysis reveals that Project B (trainers) is the more favorable investment due to a shorter payback period and a higher NPV. The essay also explores various financial factors, such as income, fixed assets, inventory, and sales activity, that should be considered before making investment decisions. Furthermore, it examines non-financial factors, including compliance with legislation, effective relationships, and business reputation, which are critical for a comprehensive decision-making process. The conclusion emphasizes the importance of considering both financial and non-financial aspects to ensure the company's long-term success and well-being.