Realforecast opinion: Usually, it depends on the pattern, if it’s intermittent demand series or continuous, if it’s high volume or low volume, if it has more than 2 years or history, for Seasonality detection, if trend is additive or multiplicative, if the History is broken (with events or missing data) etc. In ForecastPRO, I use automatic Expert solution, but I can choose also some other statistical model to apply, it the software says it fits. Most used family model is Exponential Smoothing (Winters, but also NA-CL for non-trended series) -> it can accept also Event Modelling. For intermittent series, Croston and Discrete; for many point without broken history -> BoxJenkins (ARIMA). I have also the option for Machine Learning and Dynamic Regression (other factors correlation). Forecast by Analogy and Component model for NPIs complete the full circle of easy-forecasting! I had good results on TOP-DOWN forecasting, when the products are the same type, and Bottom-up, when they are different. With so many options, and so much experience from US market, I can easily manage Demand in an easy and fast way!