The next analysis was using the mean average of the EPE prediction as a reference (blue line), which was compared with thecombination of the RS, ES and ARIMA (red line), the ARIMA and RS(green line) and ES and RS (cyan line), as presented in Fig. 4. Table 2shows the percent error of the time series combination, the highesterror presented in Table 2 was reduced about 5% in relation to theES method and about 6% for the ARIMA method. To sum up the bestcombination to make the forecasting was the mean value of the RSand ES, followed by the RS, ES and ARIMA, and the last one is theARIMA and RS.