Seeing a burn down based on Σ Original Estimate

[kateu]

Hi - I would like to set my scrum board to burn down based on Σ Original Estimate. That is, as the sub-tasks of a task have time logged or are completed, I want to see this reflected in the burndown. Is this possible? 

[Nic Brough _Adaptavist_]

You do not burn down on sub-tasks when you're doing Scrum, and hence Jira does not support it.

[kateu]

But if my sub-tasks all have a original estimate, completing sub-tasks is basically logging time. If my user story has a sigma original estimate of 1 week, and a sub-task has an original estimate of 1 day, why shouldn't the remaining time be 4 days once the sub-task is closed? 

[Nic Brough _Adaptavist_]

There's no "but" here.  You do not burn down on sub-tasks. Whatever estimate is put on them is irrelevant to burn down.

That is not what burn-down is for.  It is not measuring time spent or partial completion.  It measures what you deliver against what you said you would.

[kateu]

So, the sigma original estimate is just a convenient way to add the original estimates of my sub-tasks. If I log time on my sub-tasks, there is no way to show "sigma logged time." I have to log time only on the parent ticket for remaining time to show.