Event log - Enrich REMAP with agregation option

Use case:

"REMAP ACT1 and ACT2 as ACT3"

As of today

> all sub activities and connections are considered (sum) in the grouped activity

Feature

> possibility for each information to define (or not) an aggregation

> Activity frequency (sum, avg etc.

> user (first, last)

> duration (wait, processing)

> etc.