How can I customize the report for defect leakage ratio for bugs( based on test environment(QA/UAT/Prod).
I assume you want to display the report where bugs are split by the development stage when they have been discovered.
Please tell me how you distinguish the bug/defect in relation to a specific test environment.
If that is a Jira customfield - do you import it as a dimension?
Please explain how you define leakage and what calculation stands behind that.
If possible - describe how you want the figures to be displayed in the report - what you want to see on report rows and columns, and what filters you plan to apply.
Knowing these details might help to suggest a reasonable solution for you.
Oskars / support@erazyBI.com