Hi
There are two thing in a project in the concern of defect
1. Severity
2. priority
Priority identifies the importance of the defect. IF it is blocking issue, then it must be
resolver first.Blocking means you can not execute the test cases without working that feature, even if
you do the testing that will be partial testing and agian you have to verify all the TC so that will be a effort wastage.
It is also possible that severity can be fatal but it does not mean that it will be on higher priority
Thanks & Regards
Whatifgame