Informational Scenarios for Data Warehouse Requirements Elicitation

We propose a requirements elicitation process for a data warehouse (DW) that identifies its information contents. These contents support the set of decisions that can be made. Thus, if the information needed to take every decision is elicited, then the total information determines DW contents. We propose an Informational Scenario as the means to elicit information for a decision. An informational scenario is written for each decision and is a sequence of pairs of the form <Query, Response>. A query requests for information necessary to take a decision and the response is the information itself. The set of responses for all decisions identifies DW contents. We show that informational scenarios are merely another sub class of the class of scenarios.