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Hi @Arsa Nikzad, I just read some articles that might be interesting for the error measures. For the medium and towardsdatascience articles, if it doesn't work you can try "private browsing" in your browser. https://towardsdatascience.com/forecast-kpi-rmse-mae-mape-bias-cdc5703d242d https://nicolas-vandeput.medium.com/how-to-forecast-intermittent-products-c5d477b90176