Based on customer numbers the E-Plus group is the third largest network operator in Germany. With its successful multi-brand strategy and customized offers the mobile phone group provides pioneering innovations for the sector time and time again from a customer's perspective. Creating a Business WareHouse (BWH) based on Microsoft BI. Consolidation of all data sources of E-Plus on a big data platform using an Analytics Platform System (APS) until 2015. Establishment of a BI competence center in controlling.