OLAP, Online Analytical Processing, are being used aggressively by organizations to discover valuable business trends from data marts and data warehouses.
OLAP provides a historical view of data, although useful when used by itself, OLAP analysis becomes truly powerful when combined with predictive analysis from Data Mining.
Introduction to OLAP : Slice, Dice and Drill!
Selecting an OLAP Application: Minimizing risks in the product selection process
Designing OLAP Solutions: MOLAP, ROLAP, HOLAP and other acronyms!
Introduction to OLAP (08 February 2007)
Selecting an OLAP Application (10 January 2007)
Designing OLAP Solutions (07 December 2006)
OLAP Analysis (05 December 2003)