In order to support basic understanding of data warehousing concepts, we have created a number of articles on data warehousing. Reading those, will help to apply basic concepts.
DWH Wiki provides articles on the following data warehousing concepts:
OLAP cubes can be thought of as extensions to the two-dimensional array of a spreadsheet as the data will be arranged as an element of a multi-dimensional cube.
AcceleratedSAP (ASAP) is developed by the SAP AG in Walldorf as a special methodology of project management. The goal is the improved design and accelerated implementation of SAP R/3 Systems or data warehouse projects with SAP BI.
The star schema is a specific type of a multidimensional data model and is explained in our article.