• Sajith Kannoth

    Principal Technology Architect

    April 12, 2023

Technical migration from SAP ECC to SAP S/4HANA – Lean case study

Title  Migration from ECC to SAP S/4HANA 
Industry   Manufacturing
Customer   Confidential 
Region  The US
Scope  Perform a technical migration of ECC to SAP S4HANA (Brownfield implementation) 
Tech. Stack  ABAP, Web Dynpro, SAP UI5 , SAP Solution Manager Focused Build, SAP , SAP S/4 HANA


Customer ECC system has grown huge and there was no proper archiving in place. The system contains lots of redundant data and unused company codes. Users started complaining about poor performance and the support team observed poor database response times and rapid growth in the database. 

Customer wanted to cleanse the redundant and unused data and to improve the overall performance of the system.  

Switching to S4HANA was the best recommended option as mainstream support by SAP for ECC would end by 2027 and most of the customers are already in the process of migrating to S4HANA. 

Solution and Approach 

Implementation of S4HANA can be done from scratch (Greenfield Implementation), which was not a feasible option as the customer has lots of custom code and reports with complex business scenarios.  

 ECC to S4HANA conversion (Brownfield implementation) was decided as the desired implementation approach and was also recommended by SAP.  

Started with the detailed assessment of the systems and entire landscape as part of the preparation.

The ECC system was on Linux / Oracle and the conversion also included database migration from Oracle to HANA.

A sandbox system was built as a copy of Production environment wherein the Pilot migration was performed.

High level migration process steps at different levels listed below.

Lessons Learnt and Conclusion:

Migration to SAP S/4 HANA has to be performed sooner or later, due to support constraints and innovation gap. The sooner the decision is made, the organization will get competitive advantage.

Detailed and thorough assessment of the landscape need to be performed before deciding to go with Greenfield or Brownfield Implementation

Brownfield Implementation is much quicker compared to Greenfield and has minimum business impact.

Always perform 2 or 3 Pilot migrations to avoid unexpected issues during cutover and to reduce downtime.

Optimize your custom codes to better utilize the benefits of HANA database and in-memory computing and CDS views.

It is highly recommended to perform data archiving and cleanup of master data before the migration.

Overall conversion project can be better managed using Project Management capabilities in SAP Solution Manager Focused Build.

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