Enterprise Performance Management is the performance monitoring process across the enterprise to improve business performance. Enterprise Performance Management includes a system that integrates and analyzes data from multiple sources. These resources include, but are not limited to, data warehouses, external data sources, business intelligence solutions, data sets that hold them locally, and e-commerce systems. The overall purpose of EPM is to match the sources you need to apply in order to achieve the desired goals. You need a system to ensure performance monitoring across the enterprise, as well as analyzes that allow you to fine tuning as you proceed to achieve these goals.