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Greenfield vs Brownfield implementation

For transitioning to S/4HANA there are two fundamental options.

Greenfield: You could either implement S/4HANA from scratch and migrate your existing data in a greenfield approach,

A new implementation of S/4HANA, also known as a ‘Greenfield’ migration, enables complete re-engineering and process simplification.
The Greenfield approach lets organizations predefine migration objects and best practices, lowers Time-to-Value and TCO and facilitates faster adoption of innovation.

Brownfield: Alternatively you could transition your existing ECC to S/4HANA including all of its customizations and data in a brownfield approach.

System conversion, also known as the ‘Brownfield’ approach, enables migration to S/4HANA without re-implementation and without disruption to existing business processes. At the same time, it enables reevaluation of customization and existing process flows.

System conversion, also known as the 'Brownfield' approach, enables migration to S/4HANA without re-implementation and without disruption to existing business processes.

 
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