Every organization relies on its IT portfolio to underpin Business and IT Capability Planning, aiming to gain a competitive edge. However, this reliance can lead to intricate, rigid, expensive application landscapes with redundant processes and technologies. The elimination of these inefficiencies and duplications not only reduces IT spending but also diminishes system fragmentation, significantly enhancing service quality. IT Portfolio Rationalization provides crucial insights for business stakeholders, guiding programs and projects that contribute to Business Transformation. To ensure success, companies can engage Business and IT owners in the transformation process, allowing them to prioritize focus areas for rationalization efforts.