Academy · ABAP & RAP Development · 300 Professional
Clean Core Extensibility Levels A-D in Practice
Explains SAP's clean core level model (A to D) for extensions, which SAP evolved from the earlier three-tier model in 2025: what each level allows, how to classify a converted ECC estate with ATC clean core checks and SAP's Cloudification Repository, why an extension takes the level of its least clean component, how to plan remediation by risk and effort, and how to report clean core status to a program board.
- 48 minutes
- 5 lessons + quiz
- ABAP / RAP Developer, Solution Architect, BTP & Extension Developer
What you’ll be able to do
- Describe clean core levels A, B, C and D with examples
- Classify existing extensions by level
- Explain why an extension takes the level of its least clean component
- Plan remediation to improve levels
- Communicate clean core status to governance
Sources and further reading
- Discover How to Extend SAP S/4HANA Cloud the Right Way (clean core levels) · SAP News Center
- ATC checks and Cloudification Repository (abap-atc-cr-cv-s4hc) · SAP on GitHub
- Analyzing Customizations after System Conversion (lesson) · SAP Learning
- ABAP cheat sheet: ABAP for Cloud Development · SAP Samples on GitHub
- Practicing Clean Core Extensibility for SAP S/4HANA Cloud · SAP Learning
- Tier 2 RFC proxy (wrapper) generator · SAP Samples on GitHub