Hi @Guilherme
Welcome to the eazyBI community!
Can you please advise if you are on Cloud or Server? There is a solution that might work, if you are on Cloud (as we can access the full changelog history only in Cloud). By using MDX and finding the total days the ticket is open, the days could then be divided by the number of updates made (solution described here Count User interaction with Issue - #2 by Daniel_Luevano)
Please advise if you are on Cloud or Server.
Best wishes,
Elita from support@eazybi.com