I'm not sure if i understand the question correctly, but what I understand is that you would require to have an average age report of the issues at a given point of time. If that's the case, this link might be helpful:
Please have a look and let us know how it goes. :)
In the past, Portfolio for Jira required a high degree of detail–foresight that was unrealistic for many businesses to have–in order to produce a reliable long-term roadmap. We're tur...
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