To master ITSPM, you need to follow a framework that guides you through the lifecycle of your IT service portfolio. A common framework is based on the ITIL (Information Technology Infrastructure Library) methodology, which consists of five stages: Define, Analyze, Plan, Execute, and Communicate. During the Define stage, you must understand your business strategy, customer expectations, and market trends. You also need to establish the roles and responsibilities of your ITSPM team and stakeholders. The Analyze stage involves assessing the performance, cost, risk, and value of each IT service. You must also identify the gaps, issues, and opportunities for improvement. In the Plan stage, you design and prioritize the changes and initiatives that will enhance your IT service portfolio. You must estimate the benefits, costs, and risks of each change and initiative. During the Execute stage, you implement and monitor the progress and outcomes of each change and initiative. You must also manage any risks, issues, or dependencies that may arise. Finally, in the Communicate stage you report and share the achievements, challenges, and lessons learned from your ITSPM process. You must also solicit feedback from customers and stakeholders to incorporate into future plans.