Author(s)

Maria de Fatima Rodrigues, Carlos Ramos & Pedro R. Henriques

Abstract

Minute by minute the amount of data in the world databases is increasing inexorably. To support this growth of data the concept of data warehouse (DW) was created. DW when combined with On-Line Analytical Processing (OLAP) Codd[2] and Executive Information Systems (EIS) Buytendijk[l] tools, enable data access and visualization in a very flexible way. Fea- tures include very quick data exploration, vertical navigation (drill up/drill down), aggregation and graphical facilities. However, the amount and the complexity of data in data warehouses is so big that it becomes difficult to the business analysts to recognise trends and relations in data even with multidimensional decision support systems. A new generation of tools and techniques for automated i

Keywords