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|What is the difference between absolute and relative thresholds?|
Absolute thresholds are the default in the original PROMETHEE method: each threshold is assigned a value on the scale of measurement of the criteria (absolute difference); this value is fixed.
In some situations, for instance when the evaluations of the actions on a criterion are very different from each other (some are much larger or smaller than others), the thresholds could vary depending on the magnitude of the evaluations that are compared. It is possible to model this behaviour by using relative thresholds expressed as percentages (relative differences). For instance, one could say that he/she is indifferent to a price change smaller than 5%. In that case, a relative indifference threshold with a value equal to 5% would be appropriate.
Last update: 05:58 AM Monday, June 6, 2011
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