An energy audit is a preliminary activity towards instituting energy efficiency programs in an establishment. It is an inspection, survey and analysis of energy flows for energy conservation in a building, process or system to reduce the amount of energy input into the system without negatively affecting the outputs. The energy audit is a feasibility study. Not only it serves to identify energy use among the various services and to identify opportunities for energy conservation, but also it is a crucial first step in establishing an energy management program.