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Consultants of relavision™ are chosen to take over the main responsibility for the re-design and continued maintenance of a key Marketing Data Warehouse at the Deutsche Telecom. This multi-terabyte Data Warehouse was originally plagued with performance and usability issues. Utilizing the latest Oracle DWH technologies, relavision™ re-engineered the Data Mart, increasing the stability and usability of the system, and provided support and further development for all future business requirements of the application.