MAPVMean Area Peak Value
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Although it is slightly more complicated than the MAPV method, LPA provides a realistic comparison of achieved forecast accuracy to what would have been achieved by doing essentially nothing and using the last period actual demand as the new forecast.
The LPA, MA, and PYA methods are slightly more complicated to apply than MAPV. However, they provide a realistic comparison between an organization's full forecasting process and the placebo of using only a simple method to forecast.
Of course the MAPV method is too simplistic for real life evaluations (because we do not know what the mean is going to be in advance).