This document provides an overview and training guide for building reports in SAP Business Warehouse (BW) as a power user. It outlines the key components involved in designing BW queries, including infoProviders, structures, characteristics, dimensions, key figures and variables. It describes how to use the Business Explorer (Bex) tool to build queries through a series of exercises, adding and restricting different query components. It also covers creating workbooks to embed queries for reporting and distribution to users, as well as optimizing query performance. The overall goal is to equip power users with the necessary skills to design agency-specific reports in BW to meet business needs beyond the standard reports.