The data warehouse development effort includes source system analysis as one of its steps. During the development process, the contents of the source system are analyzed and appropriate transformations are designed and programmed to migrate the data into the data warehouse. But what happens after the data warehouse is built?

After the data warehouse is in operation, changes in the operational environment can have a significant impact on the quality of the data which reaches the decision makers. There can be changes to the business processes which use the transactional systems that can impact the data warehouse even if the system itself does not change. The data stewards play a very important role in ensuring that the business changes are transmitted to the data warehouse team.

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