Multiple choice technology testing

In a testing project, Component testing finds 100 bugs,Integration testing finds 45 new bugs,System testing finds 20 new bugs,Acceptance testing finds 5 new bugs,Customer finds (during post implementation support) 30 bugs. Component, Integration and system testing have been done by TCS. All the bugs found were Sev1 and Sev2 bugs. What is the test effectiveness?

  1. 85%

  2. 82.50%

  3. 90%

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Defect removal efficiency (or TCS test effectiveness) is calculated as the ratio of defects found during internal phases (Component, Integration, and System testing) to the total defects found (including Acceptance testing and Customer-reported bugs). Here, TCS found 165 defects out of a total of 200 (165 + 5 + 30), yielding 82.50%.

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