Éolis operates a wind farm with a remaining useful life of fifteen years. For its value in use, management wishes to use detailed forecasts over twelve years rather than five. It argues that almost all of the output is sold under a fixed-price purchase agreement covering that period and that, over the last ten years, its output forecasts have differed by less than 3% from actual results. For the three remaining years, it expects steady growth of 4% a year, whereas the long-term average growth of the electricity market concerned is 1%; no justification is provided. Write a judgement memo on the horizon and the extrapolation used.