As we all know, the future is uncertain. Take the umbrella or leave it at home? Even the best weather forecast fails at giving an answer to this question with absolute certainty. Forecasts are scientifically sound attempts to predict the future, yet they are always connected with the risk that the future reality differs from the expectation. This is because forecasts ultimately predict future events only if the underlying assumptions turn out to be correct. The special thing about forecasts is that they have a range of possible and plausible outcomes. Thus, the central planning problem is, as trivial as it may sound, the uncertainty about the future. Consequently, the outcome corridor, established by the upper and lower extremes, should be observed. In the following, corporate planning covering future opportunities and risks is called corridor or bandwidth planning.