Data warehouse and reporting in ICT Services

As Combell has been growing very intens and did many acquisitions and mergers they were in a high need for consolidated reporting.  A data warehouse was developed to do customer (churn) and contract (retention and cohort) analysis on top of approximately 20 sources (Dynamics NAV, in house developed ERP system, webservices, legacy databases). Also a master data management system was developed to create a unified product hierarchy and customer mappings between all sources.  It's a fullstack Microsoft implementation using SSIS, SQL server and the data is being visualized in powerBI dashboards on a tabular model.