Summing Estimated Mandays from Subtasks to Tasks and Epics in Jira

[Thibaut LEGRAND -HONGQIAO-]

Hello Atlassian Community,

I am currently working on optimizing our Jira board and would appreciate some assistance with a specific automation task. I've successfully set up automation rules to sum the estimated mandays from subtasks into their parent tasks. However, I'm facing challenges when it comes to aggregating the estimated mandays from tasks into the associated epics.

Here's the scenario:

1. Subtasks have estimated mandays.
2. These subtasks are linked to parent tasks.
3. Parent tasks are part of epics.

Subtasks have estimated mandays.
These subtasks are linked to parent tasks.
Parent tasks are part of epics.
I've got the automation in place to calculate the sum of estimated mandays from subtasks into their respective parent tasks using Jira Automation. This works perfectly. Now, I'd like to take it a step further and sum the estimated mandays from these parent tasks into the associated epics automatically.

I've explored various automation options, but I haven't found a solution that accomplishes this seamlessly. Has anyone successfully implemented a similar workflow in Jira?

I'd appreciate any guidance, insights, or solutions you could share to help me achieve this. If you have experience with Jira Automation rules or know of a third-party app or script that can assist with this, please let me know.

Thank you in advance for your help!