Tableau scales values automatically so that columns having a larger range of magnitudes don't dominate the results. For example, an analyst could be using inflation and GDP as input variables for clustering, but because GDP values are in trillions of dollars, this could cause the inflation values to be almost completely disregarded in the computation. Tableau uses a scaling method called min-max normalization, in which the values of each variable are mapped to a value between 0 and 1 by subtracting its minimum and dividing by its range.