Difference between A BUG, A DEFECT & AN ERROR - Can anybody share their views!!!

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Permalink Reply by Jitendra Jangid on January 27, 2010 at 10:26am

Deviation between actual result and expected result during testing  bug
If bug affects functionality of application/system during testing  defect
User gets unexpected result after supplying valid input in application while using tested system/application  error

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Permalink Reply by Sufala Pendurkar on January 27, 2010 at 10:39am

Error : It is the Deviation from actual and the expected value.
or other way u can say that Error is human mistake which produce incorrect result.
Error - Developer

Bug : 1. It is found in the development environment before the
product is shipped to the respective customer.
2. Whenever an issue in not in compliance with the
functional requirement specification(FRS) its a bug in the
software.
3. Bug : Tester

Defect : 1. It is found in the product itself after it is
shipped to the respective customer.
2. Whenever the issues are not in accordance with the
customer requirement specification (CRS) then its a defect.
3. Defect: Customer

Note : Error leads to Bug and bug leads to Defect

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Permalink Reply by Sandip Wagh on January 27, 2010 at 12:32pm

Hi ,

I agree Sufala Pendurkar Ans. its true .

Sandip Wagh

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Permalink Reply by Ravi on January 27, 2010 at 12:45pm

It was NICE! Explanation..Gr8

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Permalink Reply by Himanshu Patel on February 13, 2010 at 3:43pm

Perfect Answer!

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Permalink Reply by Abhijeet Bhagat on February 14, 2010 at 12:37pm

Nicely put and its easier to remember the distinction the way you have put it.Thanks
Just an addendum from my side
Error May lead to Bug and bug leads to Defects and Defects may lead to failures

:) lemme know if it makes sense.

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Permalink Reply by ekta varma on January 27, 2010 at 9:46pm

'Bug' , 'Defect' mean the same thing...Error is the mistake by the developers in the system which can be caught by Testers/Users and then called a bug or a defect , sometimes also called an 'Issue'.