Problem:
What implications do forecast errors have for the search for ultrasophisticated statistical forecasting model?
All forecasts contain some error whether the model is simple or sophisticated, because forecasts are predictions of the future based on past data. Forecast errors can be caused by changes in conditions that generated the past data, for example. an economic recession could change the demand for certain unnecessary products. The fact that all forecast models have some error, why would we search for more accurate forecast models. No matter what a forecaster does, they can not predict all events in the future that can cause demand to fluctuate.