First time using JIRA in this style, but a consulting firm organized the project in a way that User Stories are both a Confulence Page and a JIRA Story item. All the developer work and testing is occurring as tasks and sub-tasks related to the story.
Stories go from ToDo - Approved - In Progress - Complete - Accepted - Done
But Tasks (and subtasks) go ToDo - In Progress - Complete - Done
How do I get a burn down report on tasks and subtasks? Or do I have to force stories to done?
You simply need to do your estimation, time logging and remaining estimate updates on the sub-tasks. Have the stories sum up from sub-tasks. Stories should be defined such that they can be completed w/in a single sprint ideally. Stories and Tasks should be placed into a sprint which will result in your burn-down being calculated correctly.
A couple of other thoughts based upon the info you provided:
What you say makes sense... but how do I have stories sum up from tasks and subtasks?
To be clear we have
all the time is tracked at tasks and sub tasks.
I agree with your thoughts and yes, stories are written to be completed in one sprint.
At this moment, the burn down is not showing anything but a flat line, except when something is added to the sprint (new bug)
You enable sum up on the specific story itself. There is a check box in the view issue screen where time tracking is located. However, if you are not seeing any burn down this is not the source of your problem. Here are some things to check:
Note in your last response it seems you are indicating that Tasks are a child of Stories and sub-tasks a child of tasks. While you can link a task to a Story it isn't really a child like a sub-task is. Regardless, this fact doesn't effect the burn down, any issue in a sprint that has an OE, time spent and remaining estimate will count to the burn down as designed.
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