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This is close to point of arrival in Data Management. We are talking here of a single Staging Area leading to an enterprise-wide Data Warehouse. The detail of this scenario is covered in detail in Data Warehouse Section.
This topology has also got some variants, which are covered out here. The details of setting-up a Data Warehouse are covered in a separate section. The variants are:
Data Warehouse with a limited coverage
A large organization has a lot of systems, and even the best data warehouse will not be able to cover all. Data Warehouse is a relative and not an absolute term. Please refer to difference between the Data-Warehouse/Data-Mart and their respective criteria. If there is an initiative which meets the DW criteria, it can be called a data warehouse, even if it is not covering all possible systems. Typically an organization will have its first data warehouse covering the most critical business themes. This will further expand to include more and more themes over time.
Multiple Data warehouses
If an organization is large enough and has hundreds of systems, it may end-up with multiple information delivery platform with each being a Data Warehouse in its own right. However, these Data Warehouses will not be having overlapping purposes.
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