Defect removal efficiency is defined as the reduction of defects that are present at the beginning of a removal operation by certain percentage. Cumulative defect removal efficiency is the percent of defect that have been removed by a series of defect removal operations based on previously injected defects.
Life should NOT be a trip to the grave with the intention of arriving safely in an cool and well preserved body, but rather to skid in, chocolate in one hand, beer in the other, body wrecked, totally worn out and screaming WOO HOO what a ride!
The definition of Defect Removal Efficiency(DRE)
=The number of defects that are removed per time unit (hours/days/weeks)
This metric indicates the efficiency of defect removal methods such as Reviews and Testing, as well as indirect measurement of the quality of the product.
Remember there is something called Defect Removal Effectiveness also which measures the effectiveness of the defect removal method(e.g. Review and Testing). This is measured by no of defects removed by the prticular method divided by the total no of defects detected.
Donot get confused between effectiveness and efficiency, they are two different metrics.
Hope I am able to clarify your doubt.
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