Defects removal efficiency (DRE)depends on: A. E – errors found

defects-removal-efficiency-dre-depends-on-a-e-errors-found

Defects removal efficiency (DRE)depends on:

A. E – errors found before software delivery

B. D – defects found after delivery to user

C. Both E and D

D. Varies with project

I had been asked this question at a job interview.

My query is from Types of Software Metrics in portion Software Metrics of Software Engineering

The correct option is C. Both E and D

Easy explanation: DRE = E / (E + d).