SAP has designed a comprehensive framework for extending its solutions, ensuring businesses can adapt their SAP systems while maintaining system stability and upgradeability. For SAP S/4HANA Cloud Private Edition, the Three-Tier Extensibility Model provides clear guidelines on how custom development can be handled in a structured and secure manner. This post will break down each tier and provide practical examples to help businesses navigate these extensibility options.
This tier is built around the ABAP Cloud development model, ensuring all custom developments adhere to cloud-first principles. The key features include:
For SAP S/4HANA Cloud Public Edition customers, Tier 1 is the only available extensibility option. SAP S/4HANA Cloud Private Edition customers are encouraged to use this tier as a first approach, benefiting from side-by-side extensions through SAP BTP.
Tier 2 is unique to SAP S/4HANA Cloud Private Edition and supports use cases where customers need access to non-released SAP APIs, such as BAPIs or Classes. To ensure compliance with the cloud model, a custom wrapper is created around these non-released APIs, effectively allowing their use within the ABAP Cloud framework.
Tier 3 is reserved for classic ABAP custom development that cannot be implemented using Tiers 1 or 2. This tier presents the highest risk of software upgrade disruptions and should be used sparingly.
Businesses should periodically reassess their developments, especially after upgrades, to refactor or retire customizations when they are no longer needed or when better solutions become available.
By understanding and utilizing this Three-Tier Extensibility Model, organizations can build tailored solutions that meet their specific business needs while ensuring long-term system stability and scalability.
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