Evaluating Forecast Accuracy 
Every forecast should provide a basis for a decision in some form. So that changes in a time series pattern can be recognized early, the following parameters are calculated in the R/3 System:
- Error total
- Mean absolute deviation (MAD)
- Tracking signal
- Theil coefficient
Error Total
Mean Absolute Deviation for Initialization
Mean Absolute Deviation for the Ex-Post Forecast
Tracking Signal
Theil coefficient for the Ex-Post Forecast
Key
