Can We Reuse Tosca SAP ECC Scripts to Create SAP S/4HANA Tosca Scripts?
- Elevon Global Tech
- Aug 5
- 2 min read
Updated: Aug 7
Migrating from SAP ECC to SAP S/4HANA is no longer a question of if but when. With SAP announcing the end of ECC support in 2027, businesses are accelerating their migration plans. While the functional and technical changes of S/4HANA are well known, one question often comes up during testing discussions:
“Can we reuse our existing Tosca automation scripts from SAP ECC for SAP S/4HANA?”
The short answer is yes—to a significant extent. Let’s explore why and how.
Why Tosca Is Ideal for Migration Testing
Model-Based Test Automation (MBTA)
Tricentis Tosca is built on a Model-Based Test Automation approach. Instead of relying on brittle code-based scripts, Tosca creates reusable “modules” representing UI elements and business processes. When application changes occur, updates are applied at the module level, automatically propagating across all linked test cases.
Resilience to UI and Technology Changes
One of the biggest differences between ECC and S/4HANA is the user interface. ECC primarily relies on the SAP GUI, while S/4HANA introduces the modern SAP Fiori interface. Tosca’s technology adapters support both SAP GUI and SAP Fiori, making it easier to adapt existing automation assets instead of starting from scratch.
How Much of ECC Automation Is Reusable?
From industry experience and migration programs:
40–60% of existing scripts can often be reused with minor adjustments.
10–20% need moderate redesign due to structural or UI changes.
20–40% are newly created to cover new S/4HANA features like the Business Partner model, Universal Journal (ACDOCA), or embedded analytics.
Examples of Reusable Areas:
Procure-to-Pay (P2P) and Order-to-Cash (O2C) core flows.
Basic MRP and inventory management transactions.
Finance postings and reporting where functionality remains similar.
Areas Requiring Rework:
Transactions replaced or redesigned (e.g., Customer/Vendor → Business Partner).
Fiori app–specific processes and tiles.
Custom Z-transactions that need functional redesign in S/4HANA.
Steps to Maximize Reuse
Assess Current Tosca Assets: Identify critical ECC automation scripts mapped to business processes.
Impact Analysis: Use tools like Tricentis LiveCompare to determine which transactions and processes have changed.
Modular Updates: Update Tosca modules rather than re-recording every test.
Extend for New Features: Build new Tosca tests for S/4HANA-only functionalities.
Continuous Maintenance: Ensure test data and scheduled execution are maintained post-migration for regression readiness.
The Business Case for Reuse
Reusing existing ECC scripts accelerates automation coverage for S/4HANA by up to 40%, reducing both cost and timeline for testing. Combined with a strong support and maintenance model for script updates and test data management, it helps ensure quality and speed during and after migration.
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