Optimizer scale used in Optimizer method. The Optimizer method looks for the highest concentration (number of transactions) within a defined range and returns the midpoint of the range with the highest concentration.
Scale value is used to build discount bands for analysis from 0 to 100 as shown in the example below. Then the system will identify how many transactions lines discount percent falling in each range.
Typical suggested value is 0.5, but it all depends on the population of discount percents how low and the high they can go.