The document discusses challenges with a European mobile telco's data warehouse that contains over 150 billion call detail records. It takes too long to get answers from the data warehouse and it is underutilized. The document recommends establishing quick service teams, performing data profiling and cleansing, integrating the data warehouse into business processes, using business information portals, and RSS feeds to address engagement, user, and technical issues. This will help users get timely, accurate information and increase adoption of the data warehouse.