This document provides guidance on selecting a migration path for moving to SAP S/4HANA. It discusses the two main paths: a brownfield system conversion which preserves legacy business processes and is less disruptive but requires more effort, and a greenfield new implementation which allows for major changes and innovation but requires significant effort. The document outlines key considerations for each path such as impact to business processes, training needs, and opportunities for change. It emphasizes doing thorough planning and testing to reduce risks with either approach.