Migrating a legacy application to a new environment is a complex process that requires careful planning and execution. The process can involve several steps, including assessing the current architecture, defining the target architecture, and developing a migration plan. In this article, we will discuss how to use ArchiMate and TOGAF to create a step-by-step migration plan and provide practical examples of each step. We will focus on three critical steps: Step 3 - Develop a migration roadmap, Step 4 - Define the target architecture, and Step 5 - Assess the current architecture.