The forecasting accuracy will be evaluated by weighted root mean square error.
The weights are assigned as following:
Each hour of the 8 backcasted weeks at zonal level: 1;
Each hour of the 8 backcasted weeks at system level: 20;
Each hour of the 1 forecasted week at zonal level: 8;
Each hour of the 1 forecasted week at system level: 160;
Details of weight assignment are shown in data file: weights.csv.