Data warehousing has become a mainstream phenomenon. When the companies properly manage, store and secure their data they gain incredible competitive advantage, however, it is not enough only to collect and store the data and put it under several layers of IT protection, as this approach usually ends up drying out the patience of stakeholders, clients and developers. In theory, an enterprise data warehouse can be extremely valuable to the sponsoring organization, but in practice one cannot be implemented quickly enough or at a cost that company executives consider reasonable. Therefore, data needs to be properly managed, with adequate security features that will adequately protect the data, making it at the same time easily available for the benefit of the company, and stored (warehoused) in the enterprise data business The organizations are increasingly learning with us from the experiences of real projects, get the insight into the success stories, problems and even failures in order to be able to avoid mistakes and harness the lessons learnt from companies that have successfully implemented data management, security and warehousing projects.