Accurate requirements definition in a data warehouse project is many times more important than in other types of projects. Clearly understand the impact of business requirements on every development phase.
Business requirements condition the outcome of the data design phase.
Every component of the data warehouse architecture is strongly influenced by the business requirements.
In order to provide data quality, identify the data pollution sources, the prevalent types of quality problems, and the means to eliminate data corruption early in the requirements definition phase itself.
Data storage specifications, especially the selection of the DBMS, are determined by business requirements. Make sure you collect enough relevant details during the requirements phase.
Business requirements strongly influence the information delivery mechanism. Requirements define how, when, and where the users will receive information from the data warehouse.