This document discusses a business case template in PRINCE2. It provides an overview of the roles involved in developing a business case, including the executive who provides funding and ensures the investment is worthwhile, the senior user who specifies reasons and benefits, the senior supplier who estimates costs and time, and the project manager who maintains and updates the business case. The document then reviews sections of the business case template such as reasons, options, benefits, costs, and risks. It also discusses keeping the business case under review throughout the project stages.