Launchpad helps you to appraise a bug by giving you a calculated measure — called bug heat — of its likely significance. You can see bug heat in bug listings, and also on individual bug pages, as a number next to a flame icon.
Here's how Launchpad calculates the bug heat score:
|Adds 150 points
|Adds 250 points
|Adds 6 points per duplicate bug
|Adds 4 points per affected user
|Subscribers (incl. subscribers to duplicates)
|Adds 2 points per subscriber