OLAP counts to the methods of analytical information systems. The online analytical processing focuses on the performance of complex analysis provisions. So with OLAP an analytical processing of multidimensional, enormous amounts of data of a data warehouse can be done. This multidimensional perspective drives to decision supporting analysis result through condensing and processing of management relevant data. Consequently an OLAP system is especially for the management an indispensable, effective instrument for the analytical formatting of big data amounts.