Decision analysis
Data warehouses

Data stores are extracts of the data contained in the data warehouse, dedicated to a specific business function or class of users. Decision-makers manipulate the data in these stores using specific tools. To meet this need, each warehouse is based on a specific data model. These data models can take the following form:

• a relational DB ;

• a table manipulated using a commercially available spreadsheet program;

• a specific decision-making environment (Business Objects universe, Cognos catalog);

• a multidimensional DB.

Figure 11 illustrates these different types of data store.

Once these stores have been defined, they are manipulated...