while stateoftheart ccgts are capable of start and stop operations most of the installed capacity has not been designed to be operated in such an intermittent mode in addition existing market design does not necessarily provide an adequate remuneration of these startup and cycling costs whereas demand uncertainty on a dayahead timescale is typically in the range of of load the mean absolute error for wind is hours before real time commercial providers of forecasting solutions claim that they can reach a forecast error to hours before real time centralisation of information concerning weather forecasts and improvements of forecasting models will reduce this uncertainty