Fault Detection Percentage (FDP)

The number of defects found by a test level, divided by the number found by that test level and any other means afterwards.

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Expert Test Management 2011 Expert Improving the Test Process 2011
Fault Density
Fault Injection

How to cite

International Software Testing Qualifications Board. (2026). Fault Detection Percentage (FDP). ISTQB Glossary. Retrieved October 10, 2026, from https://istqb-glossary.page/fault-detection-percentage-fdp/.

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