Why do things go wrong? Why do things go right? Why are weather forecasts always wrong? Why are economic forecasts even worse? John Legge explains that uncertainty is part of the Universe: spending money on computers, or experts, or both may give you some comfort, but unless the forecasts are for the very short term reality will turn out differently. Enjoy this light hearted but serious look at the problems of managing and forecasting in an intrinsically uncertain world.