S/4 migration in record time: Viessmann and cbs set new standards

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The World’s largest SAP S/4HANA transformation in the manufacturing industry was successfully completed in a big bang. The challenging Project was over in just 18 months. Clever methods and an innovative strategy helped Viesmann to reach this goal.

S/4 migration in record time: Viessmann and cbs set new standards

cbs has accomplished the transition to a completely new and future-proof digital platform based on SAP S/4HANA for the Viessmann Group, a leading global manufacturer of energy systems (12,000 employees, sales of 2.5 billion euros). The seamless big bang go-live involved the migration to SAP S/4HANA of 28 production units in 34 countries and 78 sales companies worldwide. This demanding greenfield project is the largest S/4HANA transformation to date in the worldwide manufacturing industry. Viessmann also implemented innovations such as Integrated Business Planning (IBP) and MRP Live (Material Resource Planning). A total of 190 company codes and 30 billion data records had to be transitioned. More than 6,000 users were affected by the worldwide changeover, which was handled using the near-zero downtime method. The implementation was completed in just 18 months.

Harald Dörnbach, Managing Director at Viessmann IT Service, says:

“All processes in S/4 at Viessmann are running smoothly. All areas of operations – production, shipping, and warehousing – continue to run at full capacity with no disruptions. Now Viessmann has integrated, digital business processes company-wide. Our future-proof platform 2025 is up and running.”

The project partners see the undertaking as a groundbreaking success.

Rainer Wittwen, member of the cbs Management Board, says:

“The Viessmann project serves as a lighthouse for S/4 transformations in the global SAP market. It sets new standards in terms of speed, benefits, and costs. It will be used as a yardstick for future S/4 migrations.”

cbs‘ s.m.a.r.t migration approach defined a tailor-made roadmap that transitioned Viessmann to S/4HANA at high speed. Business re-engineering activities focused on value-adding processes. The consultants took a selective approach, concentrating on the structures, processes, standards and data where optimization creates added value for Viessmann. As a result, the heating technology group now benefits from innovations such as new digital planning procedures and dramatically accelerated material requirements planning with time savings of 90 percent. Furthermore, the new system has been thoroughly cleansed of obsolete, in-house developments and unneeded data.

Viessmann‘s CIO, Dörnbach, explains:

“This gives us a strong foundation for further process digitization within the Viessmann Group.”

S/4 implementation in just 18 months

At the core of the s.m.a.r.t. approach is cbs ET Enterprise Transformer for SAP S/4HANA®, the world’s first standard software for S/4 transformation. With its help, migration from the old SAP ECC system to the new platform was carried out with near-zero downtime – ensuring a seamless go-live.

The successful S/4 transformation was the single largest IT project in Viessmann’s history. Founded in 1917, the company is headquartered in Allendorf (Eder) in northern Hessen. The challenging, future-shaping project was accomplished in just 18 months.