This is not necessarily Jira specific, but most of my experience is with Jira due to long time exposure.
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No tickets are unsigned
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Tickets are assigned to the person who needs to take action, see also "Avoid depeche tickets", below
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Tickets are either open or closed
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Avoid depeche tickets, unless
- You assign for assistance
- You assign for review
- You assign for clarification
- You assign for test
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A ticket should be deployable