Abstract
This paper reports on the investigation of the actual conditions of the ESCO business that the Osaka Prefectural Government handled. The accuracy of the actual base-line correction formula was compared with the regression formula and LCEM's simulation and the practical effectiveness of the base-line correction formula was verified. The actual base-line correction formula was found to be as accurate as the regression formula and LCEM's simulation which were as useful as the base-line correction formula.