How do we bring the technical expertise and capacity to do the deployment?
Both cloud technology and the data warehouse technologies are new. Most enterprises do not have the skill-sets readily available to build or migrate to cloud data warehouses.
How do we migrate your data, while ensuring business continuity?
Data from source systems comes in all kinds of formats. Ingestion requires batch and real-time loads .
Mainframes and queues can pose difficulties in cut-over. One-time loads can be very large, catch-up loads post the initial loads need to be planned.
How do we ensure ETL and business rules migrate correctly?
The last thing you want from a cloud data warehouse deployment is that the numbers look different after migration.
Endless cycles are spent on validating the output and the new system could struggle gaining business acceptance.