The author
Thibault Pouchot
Director & Partner, project delivery, SAP Activate
By Thibault Pouchot, published 12 May 2026
Share on LinkedInIn brief
- Brownfield converts the existing ECC system, Greenfield starts from a clean installation, Bluefield transitions selectively.
- The choice depends on system quality, the volume of custom code and the ambition of the transformation.
- The end of SAP ECC mainstream maintenance, on 31 December 2027, sets the timeline.
- An SAP Readiness Check and an analysis of actual processes let you decide on facts.
Key takeaways
01
Brownfield
Conversion: data, configuration and history retained; remediation of custom code and simplifications.
02
Greenfield
A fresh start on SAP standard processes; the mandatory route for Public Edition.
03
Bluefield
Selective transfer by company, fiscal year or process; specialised tools and expertise.
04
Four prior analyses
Readiness Check, actual processes, custom code, data: four to eight weeks to decide.
Sources: SAP Support, Selective Data Transition, CIO.com (February 2025)