SAP customer Preh converted its worldwide systems in a 30-hour window last November, E3 Magazine reported. It had no Plan B.
All sites switched on one weekend, starting on Friday 14 November 2025.
The planned window was 30 hours. Preh's project manager said the team chose to have no fallback plan, because one would have made postponing possible.
Preh is a German car-parts maker with about 6,000 employees and revenue of approximately €1.5 billion in 2025. It supplies controls straight to carmakers' production lines, so a longer outage would have put production at risk, E3 Magazine wrote on 10 November.
The company moved from an older SAP system to S/4HANA after SAP announced the end of maintenance for its release. It kept its existing processes and data. Its service provider was T-Systems. Worldwide, 102 testers confirmed their areas, and the delay was 45 minutes against a planned buffer of one hour.
Two preparation projects were finished with fine-tuning postponed, and that meant extra work at the switch. The project manager said he would now spend two more months on them.
What the report leaves open: the project's cost and its total duration. Warehouse management software was put on hold and is the next step.
Sources
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