Defect priority:
It is level of fixing the bug in urgency.
It initially set by software tester.
And finalized by the project/product co-ordinator (or )manager.
Defect severity:
It is the defect which occur on development or operation of component.
It is defined by software tester by written test cases or functionality of application.
Categories involved in software testing:
| Priority (It range from low to urgent) | Severity (It range from low to critical) | 
| Low: It can be deferred until all the defect are fixed. It may or may not fixed. 
 | Low: No serious in functionality of system. More cosmetic issue. | 
| Medium: It should take precedence over low priority defects. May be fixed in next release. | Medium: Cause some undesirable behavior. | 
| High: Should fixed in any upcoming builds. Should included in the release. | Major: Cause system to collapse,except few parts. Highly severe defect. | 
| Urgent: Must fix in the next build. It should be fixed before any cause of defect occur. | Critical: Cause system failure. No further proceed on system. | 
 
thulasi
Nice....
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