“…The error rate of forecasting nickel sales at PT Aneka Tambang Tbk using RMSE is lower at 1,088,291,797,148 compared to PT Vale Indonesia Tbk at 1,439,102,096,336. Likewise, the error rate using MAD is lower at 810,285,267,786 compared to PT Vale Indonesia Tbk at 1,192,140,970,383. However, the error rate using the MAPE method is higher at 33% but still quite good compared to the nickel sales forecast at PT Vale Indonesia Tbk of 17% and is in the good category.…”