We use multiple labels to categorize and filter issue tickets. Labels can only be applied by members with push privilege. Maintaining labels is the best way to organize tickets and plan releases.
The labels we're using are following the same format: {prefix letter}:{label name}. Example: p:medium, s:delivered, t:bug.
t: Ticket type, can bet:bug,t:enhancement, ort:feature.s: Ticket status, explained in Workflow section below.p: Ticket priority, can bep:high,p:medium,p:low.
Looking at a ticket status and the current assignee, we would know in a glance who is working (or is supposed to work) on a particular issue, and the current progress on that issue. Note that only members with push privilege can assign labels. So if you don't have push privilege and you want to communicate your working progress on a ticket, make sure you communicate that clearly in an issue comment and someone will assign the proper label for you.
An unconfirmed ticket needs feedback from the reporter. Usually this happens when a bug report can't be reproduced by the ticket reviewer. These tickets will be labeled s:unconfirmed.
Tickets that are irrelevant, lack important details, or go against our guidelines will be labeled s:invalid.
Tickets that we deem not important to implement, or doesn't affect that many users to matter will be labeled s:wont-fix. Don't take it personally if your ticket falls into this category. We just have much more pressing issues to attend to.
A confirmed ticket has been reviewed by a core team member and is ready to be given a milestone and assigned to a member to work on. These tickets will be labeled s:confirmed.
When a ticket is assigned to a member, and is being worked on by that member, it should be labeled s:in-progress. If a ticket is assigned to a member for quite some time (say, a week) and it still doesn't have s:in-progress label, it's probably time to assign it to someone else.
When the assigned developer completed work on a ticket, and is ready to hand it in for code review, the ticket should be labeled s:delivered.
When the delivered ticket has been reviewed and it has been deemed to require some more work, the ticket should be labeled s:incomplete, and the assigned developer should go back to work. It will be reviewed again when it is delivered again.
When a ticket's solution is complete and approved to be committed, we can strip all of its s and p labels (except for the s:confirmed label), but retain the t label.