Severity: It is the impact of the bug on the application. Severity level should be set by tester. The Severity levels are: Low, Medium, and high, very high and Urgent. It is set by the tester and it can not be changed.
Bug causes system crash or data loss.
Bug causes major functionality or other severe problems; product crashes in obscure cases.
Bug causes minor functionality problems, may affect “fit and finish”.
Bug contains types, unclear wording or error messages in low visibility fields.
Priority: How important is it to fix the bug is priority. Priority levels are set by the team lead or test manager and it can be changed as required.
Must fix as soon as possible. Bug is blocking further progress in this area.
Should fix soon, before product release.
Fix if time; some what trivial. May be postponed.
