Successful Migration of 545,000 Objects to SAP S/4HANA at SBB Real Estate – Powered by COS-33

With one of the country’s most extensive real estate portfolios – from train stations to retail spaces and residential properties – SBB Real Estate faced a major challenge: migrating over 545,000 objects from SAP R/3 and external systems to SAP S/4HANA. This ambitious project demanded strict standards in data accuracy, consistency, and performance.
The key to success: the COS 33 solutions

• CS 340 - S/4HANA migration cockpit RE-FX
• CS 305 - RE-FX master data mass processing

Initial situation

Over the years, the SAP R/3 environment had accumulated complicated structures and datasets. The transition to SAP S/4HANA was not just a technical upgrade but a full consolidation of real estate data into RE-FX. The challenge: migrate 300,000 objects from R/3 and integrate another 245,000 from external systems, all while ensuring transparency and minimizing manual work.

Solution: COS-33 in use

CS 340 - S/4HANA migration cockpit RE-FX

At the heart of the migration, the CS 340 Cockpit proved decisive. It ensured that over 300,000 objects from SAP R/3 were transferred to S/4HANA in a structured, transparent, and audit-proof way. With its simulation, transformation, and logging features, every step of the journey was controlled and traceable:

• Detailed mapping rules for accurate, real-time transfer
• Successful conversion of areas, rental and deposit agreements, and partner roles
• Streamlined cleanup of redundant organizational units
• Smooth integration of custom tables and fields
• Full audit trail for maximum security and transparency

CS 305 - Mass processing of RE-FX master data

With the CS 305 solution, approximately 245,000 objects from third-party systems were recreated in SAP RE-FX within a short time. Standardized templates and integrated upload functions ensured fast, consistent, and reliable data processing.

Result

The journey to SAP S/4HANA has been a complete success: efficient, transparent, and fully auditable. Today, SBB Real Estate operates with:

• A single source of truth in SAP RE-FX
• Streamlined, automated processes that guarantee quality
• An agile architecture built for the future

Conclusion: COS-33 was not simply a technical enabler – it was the strategic lever that turned a complex migration into a foundation for long-term growth.

PS A special thank you to Sandro Baumeler, who successfully led the project as Lead Data Migration Real Estate.