User:Lowa84/Forecast bias

The forecast bias is a consistent deviation from the mean in one direction (high or low). Forecast bias is the tendency of a forecast to systemically miss the actual demand. A normal property of a good forecast is that it in not biased. .

The formula for forecast bias is:


 * Tracking signal = Σat - ft / n

where at is the actual value of the quantity being forecast, ft is the forecast and n is the number of periods.