The defect leakage ratio is a metric used in software testing to measure the percentage of defects that were not detected during the testing phases and were discovered only after the software was released to the production environment or reported by end users. This metric helps assess the effectiveness of the testing process.
The formula to calculate the defect leakage ratio is:
Defect Leakage Ratio = ( Number of Defects Found in Production /Total Number of Defects ) × 100