severity of a bug is technical in nature and it is always constant. Can be said to be how bad a defect is while Priority is ushally more of a business decision and would depend on the business objective of the application and how its owners see the bug
Example of severity is that the application of product crashes.Priority could be that a certain important customer finds a bug and that the bug needs to be resolved- but need not effect the overall quality of the product
 Posted by: Rashmi Date:
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severity giving based on time,priority giving based on functionality