Have you come across situations where the information in the warehouse, relating to customers and their transactional history, becomes better or more valuable than in the system from which the transactional details were extracted? If so, were steps taken to "update" summary type records in the transactional or CRM system? Was this successful? Are you aware of case studies detailing similar solutions?
Sid Adelman's Answer: Since you probably cleaned up and integrated the source data, the data warehouse now has better data than the operational systems. You may run into the problem of a discomfort with reports that are now inconsistent between the warehouse and the operational systems. You will have to determine if the operational reports or your (more accurate) data warehouse reports will be the official information.
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