DRE Design Review & Risk - Online Calculator

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🐞 Defect Analysis / DRE

Defects by phase → defect density · DRE defect removal efficiency · escape rate (software quality metrics)

Basic Parameters

Software Size (KLOC / FP)

Defects Found After Release / in Production

+ Defects by Dev/Test Phase (phase name + defect count)

Phase Name

Defect Count

Phases Added

#	Phase	Defects	Share

Notes

· DRE (Defect Removal Efficiency) = defects found in dev+test ÷ total defects ×100%; escape rate = post-release defects ÷ total ×100%.

· Defect density = total defects ÷ size (KLOC). Benchmark: DRE >95% Excellent, 80–95% Good, <80% testing needs strengthening.

Calculate defect removal efficiency (DRE) by phase, defect density and Pareto defect distribution for software quality measurement and improvement.