Energy Accounting is the management technique that quantitatively monitors energy consumption, relates consumption to key independent variables such as production and weather, and assesses energy performance or efficiency over time and against relevant benchmarks. The successful practice of energy accounting is predicated on the identification of the right kinds of data to be collected, the use of appropriate statistical methods to correlate consumption to the independent variables, and the reporting of the right information to the right people in the organization. Energy Monitoring and Targeting (M&T) is a technique for energy performance analysis that overcomes possible deficiencies in the traditional performance indices or energy intensity.