Selective Data Transition is the formally recognized hybrid approach for migrating to SAP S/4HANA. It strategically combines elements from both Greenfield (new implementation) and Brownfield (system conversion) strategies. This method allows an organization to start with a clean, standardized SAP S/4HANA system (a Greenfield characteristic) while selectively migrating necessary historical data beyond just master data and open balances (a Brownfield characteristic). This provides the flexibility to redesign processes and adopt innovations without losing valuable business context from legacy data, effectively offering the "best of both worlds."

A. Cloud-Native Apps: This is an application development and architecture paradigm for building applications in the cloud, not a core ERP migration strategy.

C. Side-by-Side Migration: This refers to an extensibility model where new applications are built alongside the core ERP, not a method for migrating the core system itself.

D. Hybrid Cloud: This describes an IT infrastructure deployment model that mixes on-premise and cloud environments, not the approach for migrating application data and processes.

1. SAP White Paper. (2020). Selective Data Transition to SAP S/4HANA. SAP SE. In the introduction (Page 3), the paper states, "This approach is a flexible way to S/4HANA and combines advantages of the other two scenarios (new implementation and system conversion)." It further details how it allows for process optimization while retaining selected historical data.

2. SAP Activate Methodology Roadmap. Transition to SAP S/4HANA. SAP SE. The methodology officially outlines the three transition scenarios. In the "Discover" phase deliverables, the "Transition Strategy" task explicitly details New Implementation (Greenfield), System Conversion (Brownfield), and Selective Data Transition as the hybrid option.

3. SAP Help Portal. Conversion Guide for SAP S/4HANA. The official documentation on transition paths consistently presents Selective Data Transition as the third option alongside New Implementation and System Conversion, designed for customers who want to consolidate systems or perform selective data migration, thus acting as a hybrid approach.