This Masters Thesis describes the architecture of the Aware Design Tool. The Awa re Design Tool supports a data warehouse design methodology. We briefly describe the advantages of utilizing a design methodology. We describe the architecture of the Aware Design Tool. This includes a descripti on of the communication among the components in the Aware Design Tool. Furthermore, we describe all the components in the Aware Desi gn Tool. We suggest expansions to the Aware Design Tool. This include a Controller, a Gua rdian and a conceptual query language. Finally, we conclude about our experiences regarding the Aware Design Tool as we ll as providing suggestions to future work.