SAP Migration · 6 min read · December 2025
Brownfield, greenfield, or selective for your S/4HANA migration
By Thinklytics Partners, SAP S/4HANA Practice
Brownfield converts your existing system, greenfield rebuilds clean, and selective moves chosen data and processes. The right choice depends on your data condition.
Topics covered
- Brownfield
- Greenfield
- Migration Approach
- S/4HANA
Frequently asked questions
What is the difference between brownfield and greenfield?
Brownfield converts your existing ECC system in place. Greenfield rebuilds S/4HANA fresh with new processes. Selective moves the data and processes you choose, between the two.
Which migration path is fastest?
Brownfield is fastest in theory, but only if your data and custom code are in good shape. If they are a mess, it stalls, and another path may be cheaper overall.
When is greenfield the right choice?
When you want to redesign processes and leave legacy customization behind. It is the cleanest result but the most disruptive, and it still needs clean data migrated in.
What is a selective transition?
A middle path that moves selected data and processes rather than converting everything or starting fresh. It needs a clear view of what is worth carrying forward.
How do we choose the right path?
Run a readiness assessment and a blueprint first. The condition of your data and the value of your customization point clearly to the right approach, with evidence.
Does the path change the data work?
No. Every path lives or dies on data. Brownfield, greenfield, and selective all require clean, well-mapped data to succeed.