Chart bug raise rate

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Our process is to raise a bug in jira as a sub-task when a fault is found by a tester and is assigned to the developer responsible for the DUT.

As a tester - I would like to see how many bugs are raised per week on a DUT in the form of a line chart.

How do I chart the number of sub-tasks created under a specific task over a period of time?

[Aron Gombas _Midori_ · Accepted solution]

I'm not sure what is a DUT, but you should be able to use a JQL like this to find the subtasks of a Jira issue:

parent = FOO-123

...where FOO-123 is the parent's key.

Then you could try use the Created vs. Resolved gadget fed by this query.

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A DUT is a Design Under Test - the design task would be foo-123 and sub tasks are bugs found with the DUT.

When I try to use a created vs resolved gadget, it says no "No project or filter specified."  when I enter "parent = PER-1064" under the "Project or Saved Filter" field of the "Created vs Resolved Chart"

[Aron Gombas _Midori_]

It expects a saved filter there, not a JQL query string!

So create a saved filter with that JQL, give it a name, then it will appear in that drop-down as an option.

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Thanks for your help Aron, however this is showing the number of unresolved issues rather than the rate of issue creation.

I would like to see the first derivative of the created chart, is this possible?

[Aron Gombas _Midori_]

Unless I'm mistaken, the "Collection Operation" parameter of the gadget serves that purpose.

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Not really, the graph i'm looking for is issues raised per month like this:

or this

I've exported the data from the query and plotted it in excel.

This work around will do, but it would be nice to have this built into Jira.

[Aron Gombas _Midori_]

If you use Excel to solve this, you should definitely check out our app called Better Excel Exporter.

It has a report template dedicated to created vs resolved pivot tables and pivot charts. Using this (or a customized version of this) you could reduce the manual work of re-creating the chart every time: