Defect Removal Efficiency Calculator


Calculating defect removal efficiency is crucial for assessing the effectiveness of a quality assurance process in software development. To simplify this task, we’ll provide a handy calculator.

How to Use

Simply input the required values into the calculator fields and hit the “Calculate” button to obtain the defect removal efficiency percentage.


Defect Removal Efficiency (DRE) is calculated using the following formula:

Example Solve

Suppose there were 200 defects found before release, and a total of 500 defects were injected during development. Using the formula:




Q: What is Defect Removal Efficiency?

A: Defect Removal Efficiency (DRE) measures the effectiveness of defect removal activities during software development. It indicates the percentage of defects identified and fixed before release compared to the total number of defects injected.

Q: Why is DRE important?

A: DRE helps in assessing the quality of the software development process. A higher DRE indicates a more effective defect removal process, leading to higher-quality software.

Q: How can I improve DRE?

A: Improving DRE involves implementing robust quality assurance practices, such as thorough testing, code reviews, and continuous integration, to detect and fix defects early in the development lifecycle.


Calculating defect removal efficiency is essential for evaluating the effectiveness of quality assurance processes in software development. With the provided calculator, you can quickly determine the DRE percentage, aiding in improving software quality.

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