Learn how Varian Medical Systems, Inc. successfully migrated its legacy landscape based on SAP Business Suite powered by SAP HANA to SAP S/4HANA 1709. This session covers best practices for SAP S/4HANA system conversion (brownfield migration) and challenges faced during the migration, such as custom code, master data cleanup, and more.

Key takeaways:

  • Understand Varian’s need for migration and transformation.
  • Hear reasons and results for using the brownfield approach.
  • Learn about Varian’s master data cleanup, custom code lifecycle management, and UI strategy.


Nagarajan Nallaiah, Manager – Technology, Varian Medical Systems, Inc.

Liji Mathew, Sr Basis Administrator, Varian Medical Systems, Inc.


  • About Varian- 3:10
  • SAP S/4HANA Business Case Drivers- 7:26
  • SAP S/4HANA Migration: The Business Imperatives- 11:08
  • Why the Brownfield Approach?- 13:14
  • Master Data Clean Up- 15:50
  • Custom Code Lifecycle Mgt- 18:10
  • Business Process Change Impact- 21:45
  • Dealing with Third Party Interfaces and Batch Jobs- 24:40
  • UI Strategy on SAP S/4HANA and Experience with Fiori- 26:45
  • SAP S/4HANA Conversion and Migration- 30:50
  • Migration Timeline- 36:20
  • Overall Summary- 38:17

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