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SAP Clean Core Why a clean core is becoming increasingly important
Many SAP systems follow the same pattern: they have grown over the years, been customized, and often even extensively modified. What originally provided flexibility is increasingly becoming a hindrance. Release upgrades are postponed, innovation projects are delayed, and the system landscape is becoming increasingly complex. This also drives up project costs for new initiatives significantly.
At the very latest since many customers switched to SAP S/4HANA and increasingly cloud-based ERP models, the architectural framework has been fundamentally changing.
In the future, SAP will pursue this approach even more rigorously: standardization at the core and targeted expansion beyond the core—this underlying architectural principle is called SAP Clean Core.
For companies in logistics, manufacturing, and transportation management, this approach is no longer an optional architectural concept but a central prerequisite for stable, upgradeable, and future-proof SAP system landscapes.
What SAP Clean Core Actually Means
At its core, SAP Clean Core follows a clear architectural guideline:
a stable SAP standard without modifications, scaled exclusively through approved APIs and extension options.
This avoids modifications as well as non-release-ready developments or customizations to the SAP standard code. There is a consistent separation between stable core processes and individual extension logic. In this way, Clean Core deliberately distinguishes itself from traditional Z-developments and redefines the rules of the game in this context.
In the Clean Core context, SAP distinguishes between two fundamental extension approaches:
- In-App Extensions: Extensions within the system, but strictly via approved extension options
- Side-by-Side Extensions: Decoupled applications and services outside the SAP core, typically on the SAP Business Technology Platform (BTP).
This architectural model applies consistently to SAP S/4HANA as well as to specialized S/4 solutions such as SAP EWM, SAP TM, or SAP DM—regardless of whether the systems are operated on-premise, in the private cloud, or in hybrid scenarios.
A New Approach to Extensibility
SAP Clean Core does not mean doing without custom process logic, but rather consistently decoupling it from the SAP core.
SAP provides a comprehensive technological framework for this:
- SAP BTP (Business Technology Platform) as a central extension and integration platform
- ABAP Cloud for standards-compliant development
- RAP (RESTful ABAP Programming Model) for service-based applications
- SAP Build for low-code and pro-code scenarios
- Event-based architectures with SAP Event Mesh
This allows for the targeted implementation of specific logic requirements—such as those in warehouse logistics or production control—without modifying the SAP core.
The result is customized solutions that remain highly compliant with standards, feature a clear architectural structure, and ensure sustainable release capability.
Extensions in SAP EWM
Custom checks, additional process logic, or mobile applications in SAP EWM can be implemented using approved extension points or connected services.
Process Automation via SAP BTP
Workflows, exception handling, and approval processes are implemented outside the SAP core—for example, via BTP services—and thus remain flexible, scalable, and independent of release cycles.
All scenarios follow a clear principle: Extensions are still explicitly planned—but consistently outside the SAP core. Transformation projects show that companies can reduce complexity in this way and create a robust foundation for future extensions and innovations.
An Overview of the Benefits of SAP Clean Core
A clean SAP core pays off immediately, both technically and economically:
- Greater update and release capability by avoiding customizations in the core
- Stable system landscape with a clear architectural structure
- Reduced total cost of ownership (TCO) due to lower maintenance costs
- Faster innovation cycles through decoupled extensions
- Better governance and compliance through transparent extension logic
- Future-proofing for cloud ERP and hybrid scenarios
SAP Clean Core is thus becoming a key prerequisite for modern, scalable, and maintainable SAP landscapes.
The SAP Business Technology Platform as a central component of the Clean Core architecture
The SAP Business Technology Platform plays a central role in the Clean Core model.
It forms the technological basis for:
- Integration layer between systems
- Platform for custom extensions
- Foundation for data-driven applications and automation
The clear separation of the SAP core and extensions enables flexible architectures that can be dynamically adapted to new requirements without compromising the stability, maintainability, or release capability of the core system.
Practical implementation
SAP Clean Core is not a theoretical concept, but an architectural decision that must be consistently implemented in practice, especially in complex logistics and production environments.
IGZ supports companies throughout the entire transformation process:
- Analysis of existing system landscapes and identification of critical modifications
- Definition of a Clean Core target architecture for SAP S/4HANA, EWM, TM, and MFS
- Development of standards-based solutions with a focus on extensibility and maintainability
- Implementation of BTP-based extensions and integration scenarios
- Long-term assurance of release readiness and scalability
The focus here is on consistently evaluating the usability of the SAP standard while maintaining the necessary flexibility for individual process requirements.
Conclusion: Clean Core as a Strategic Architectural Principle
SAP Clean Core is not a short-term trend, but a fundamental architectural principle of modern SAP ERP landscapes.
Especially in complex logistics and production environments, the SAP Clean Core strategy is another building block for high-performance EWM, TM, and MFS landscapes that are also easier to maintain.
IGZ helps companies align their SAP systems with the right mix of Clean Core and necessary customization.
We look forward to hearing from you!
