At the moment the class DurationOutliersReader which computes outliers, does not take into consideration the type of a variable, but just its name and its value. This creates problems when trying to map a variable to a label as we can only uniquely identify a variable on the process definition level by its name and its type.

In order to overcome this obstacle, we should refactor the DurationOutliersReader class to include the type of the variable in the aggegations