This document is a presentation on writing business cases. It was presented by Venkadesh Narayanan from Fhyzics to the IIBA Chennai Chapter. The presentation provides an overview of key components of a business case, including defining the problem, analyzing costs and benefits, identifying risks, and presenting the analysis in a business case report structure. It emphasizes that a business case should demonstrate value to stakeholders and use metrics like net present value, return on investment, and benefit-cost ratio to evaluate investment options.