Bug Life Cycle

By PSR -
BUG
What is a BUG?
A bug is a deviation from the requirement.
Or       
Bug can be defined as the abnormal behavior of the software.

Classification of Bug:
  1. Functionality bug
  2. Security bug
  3. Interface bug
  4. Cosmetic bug
Guidelines on deciding the severity of bugs:
  1. Critical/show stopper: An item that prevents further testing of the product or function under test can be classified as critical bug. No work around is possible for such bugs.
Ex. A missing menu option or security permission required to access a function under test.

  1. Major/high: A defect that does not function as expected/designed or cause other functionality to fail to meet the requirement can be classified as major bug. The work around can be provided for such bug
Ex. Include inaccurate calculation the wrong field being updated.

  1. Average/Medium: The defects which don’t conform to standards and conventions can be classified as medium bugs. Easy workaround exists to achieve the functionality objectives.
Ex. Matching visual & test ink which lead to different end points.

  1. Minor/low: cosmetic defect which doesn’t affect the functionality of the system can be classified as minor bugs.
Difference b/w Bug, Defect, Error, and Fault/Failure:

Defect: if the test engineer with respect to the functionality identifies a problem then it is called defect.

Bug: If the developer accepts the defects that is called as bug.

Error: It is a problem related to the program.

Fault/Failure: The customer identifies the problem, after delivery it is called fault/failure.

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