The daily demand curves used in MLP’s training were Mondays between January 01, 2001, and July 30, 2001 (total of 15 vectors). Fig. 3 shows the reference curve and the output curve calculated by the MLP for Monday August 6, 2001. The number of MLP inputs and outputs in this case are 48 and 24, respectively, with two 15-unit hidden layers. Average Forecast Error (AVG Error), Maximum Forecast Error (MAX Error) and Standard Deviation of Error (SD) are 5.0%, 8.6% and 1.7%, respectively.