Scenario
A large enterprise already has:
- SAP BW/4HANA running 300+ reports
- Complex ABAP routines
- Legacy extractors from SAP ECC
- Executive dashboards in SAP Analytics Cloud
Now they want to adopt SAP Business Data Cloud for:
- Cloud innovation
- AI capabilities
- Harmonized KPIs
- Future-ready architecture
But they cannot shut down BW immediately.
What Is Co-Existence Strategy?
Co-existence means:
Running BW and BDC in parallel while gradually transitioning workloads to BDC without disrupting business reporting.
Architecture in Co-Existence Mode
-Keep BW for Stable, Complex Scenarios
Continue using BW for:
- Heavy historical data
- Complex transformations
- Custom ABAP routines
- Regulatory reports
BW remains the trusted backend for legacy workloads.
-Introduce BDC for Innovation Layer
Use BDC for:
- New analytics use cases
- Cross-cloud data integration
- AI-driven insights
- Harmonized global KPIs
BDC acts as the strategic future data platform.
-Integration Between BW and BDC
There are multiple patterns:
✔️ BW → BDC
- Expose BW models to BDC
- Use BW as data provider
- Modernize semantic layer in BDC
✔️ Shared Consumption
- SAC consumes from both BW and BDC
- Gradually shift dashboards to BDC
✔️ BW Bridge Approach
- Reuse BW objects in cloud-friendly architecture
- Reduce redevelopment effort
Migration Phases
| Phase | Strategy |
|---|---|
| Phase 1 | Stabilize BW + Start BDC |
| Phase 2 | Move new use cases to BDC |
| Phase 3 | Gradually migrate semantic models |
| Phase 4 | Retire BW (optional, long-term) |
When to Choose Co-Existence?
Choose this strategy when:
- Large BW investment already exists
- Business cannot afford reporting downtime
- Regulatory models are complex
- Step-by-step cloud transformation is required
Interview-Ready Answer (Short Version)
In a BW + SAP Business Data Cloud co-existence strategy, BW continues handling stable, complex legacy workloads while BDC is introduced for new cloud-native, AI-driven, and harmonized use cases. Over time, workloads are gradually migrated, ensuring zero disruption and a phased digital transformation.
You can also checkout ebooks for SAP BDC – Quick Revision – using the link :
Part 1 : https://topmate.io/vartika_gupta11/1954785
Part 2 : https://topmate.io/vartika_gupta11/1956232
Also can schedule a mock interview either by me or my team at topmate for SAP BDC – 35+ Minutes : https://topmate.io/vartika_gupta11/1962923
You can reach out to me or follow my profile for more such helpful content : Vartika Gupta | LinkedIn