Is there a widget that can be configured to display how the average number of bugs per task/story we have for each of my projects over the last x amount of days?
If this is possible, but for only 1 project at a time, no big deal for me to implement multiple instances of a widget that can provide the data needed.
Apart from the standard gadgets that are offered by JIRA by default (https://confluence.atlassian.com/display/JIRA/Using+Dashboard+Gadgets), most likely you will have to look into the possibility of developing your own gadget. The following link might be able to help you out on this:
If you do not have the resources, you can also seek assistance from the following alternatives:
Hey Community mates! Claire here from the Software Product Marketing team. We all know software development changes rapidly, and it's often tough to keep up. But from our research, we've found the h...
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