This energy audit involves interviews with select facility staff, a review of utility bills or other operating data and a walk through of the facility. Often a Preliminary Energy Use Analysis and Walk-Through Analysis are completed in tandem. The goal is to identify glaring areas of energy waste or inefficiency. The data is compiled and used to complete a preliminary report detailing low-cost/no-cost measures and potential capital improvements for further study in subsequent audits. This level of detail is adequate for prioritizing energy efficiency projects and to assess whether a more detailed audit is necessary.