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Migration Architecture
Migration Architecture covers the end-to-end design decisions for moving from ECC to S/4HANA (on-premise, private cloud, or public cloud), including migration approach selection, data and integration strategy, NFRs, security, rollback planning, governance, and operational readiness. It equips architects to evaluate trade-offs across brownfield, greenfield, and hybrid (selective data transition) approaches and to build defensible, risk-managed transformation roadmaps.
Overview
Migration Architecture covers the end-to-end design decisions for moving from ECC to S/4HANA (on-premise, private cloud, or public cloud), including migration approach selection, data and integration strategy, NFRs, security, rollback planning, governance, and operational readiness. It equips architects to evaluate trade-offs across brownfield, greenfield, and hybrid (selective data transition) approaches and to build defensible, risk-managed transformation roadmaps.
Lessons in this topic
- SAP Migration Architecture Tutorial (Part 1)Introduces the business and technical purpose of migration architecture and the three core approaches (greenfield, brownfield, hybrid/selective data transition) used when moving from ECC to S/4HANA.
- Comparing Migration Approaches: Trade-offs, Data Volume, and Deployment Fit (Part 2)Explores the practical trade-offs between greenfield, brownfield, and selective data transition approaches, focusing on data volume, downtime, custom code, and deployment model constraints.
- Selecting and Implementing a Data Migration Approach: Conversion, New Implementation, and Selective Data Transition (Part 3)How to choose between system conversion, new implementation, and selective data transition for an S/4HANA move, and what the technical execution of each approach actually involves.
- Post-Migration Operating Model, Cost Governance, and Roadmap Evolution (Part 4)How architects design the operating model, cost governance, and multi-year roadmap that keep an S/4HANA migration architecture sustainable after go-live.
- Cutover Architecture, Mock Runs, and Rollback Strategy for S/4HANA Migration Programs (Part 5)How to architect the cutover sequence, mock run program, and rollback decision framework for a large-scale ECC to S/4HANA migration, balancing downtime, risk, and business continuity.
Interview questions covered
- What are the core concepts of Migration Architecture, and how would you explain them clearly in an SAP interview?
- How would you apply Migration Architecture in a real SAP project? Walk through the design or implementation approach.
- A production issue is reported in Migration Architecture. What would you check first, and how would you troubleshoot it systematically?
- What are the most important design decisions, trade-offs, and best practices in Migration Architecture?
- Suppose you inherit an existing Migration Architecture solution. How would you review it before making a change?
- Using this SAP project situation — A mid-size manufacturing company running a 15-year-old, heavily customized ECC system asked an architect to recommend a migration path — explain Foundations of Migration Architecture: Why the Approach Decision Matters. What should happen, which concepts or process steps matter, and what common mistake would you avoid?
- A project encounters this situation while working on Selecting and Implementing a Data Migration Approach: Conversion, New Implementation, and Selective Data Transition: A retail group with three legacy ECC systems (acquired through mergers) needed to consolidate into a single S/4HANA private cloud instance. Walk through how you would analyze the requirement or issue, what you would validate, and how you would test the solution before release.
- You are the senior consultant/architect responsible for Cutover Architecture, Mock Runs, and Rollback Strategy for S/4HANA Migration Programs. The project situation is: A manufacturing company's S/4HANA private cloud go-live plan included three mock cutover runs. How would you assess the design, identify the highest-risk failure modes, and define the evidence required before approving it for production?
- Using this SAP project situation — Twelve months after a private cloud S/4HANA conversion, a company found that three side-by-side BTP extensions built to cover perceived functionality gaps duplicated capability that had since become standard in a subsequent release — explain Post-Migration Operating Model, Cost Governance, and Roadmap Evolution. What should happen, which concepts or process steps matter, and what common mistake would you avoid?
- A project encounters this situation while working on Comparing Migration Approaches: Trade-offs, Data Volume, and Deployment Fit: A retail organization operating across 12 countries needed to decide its migration approach for a multi-year S/4HANA program. Walk through how you would analyze the requirement or issue, what you would validate, and how you would test the solution before release.