Unverified50% confidenceFactExact time
Even in high-quality commercial software, there are on average 1–25 defects per thousand lines of code.
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50%
Confidence
Long-term
Relevance
9/5/2026
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Related Claims
UnverifiedGoogle's engineering practice report indicates that approximately 16% of test failures in large codebases are flaky failures (non-deterministic failures).69% similarUnverified在20多万行的代码库中，真正活跃的可能只有2万行，其余大量是历史遗留或已废弃的逻辑68% similarVerifiedWhen a single code review exceeds 400 lines of code, the reviewer's defect detection rate drops sharply.67% similarVerifiedGoogle's engineering practice research indicates that code review can detect approximately 60% of defects, far exceeding the approximately 30% detection rate of unit testing.65% similarVerifiedAccording to industry statistics, approximately 60–80% of defects in software projects originate from misunderstandings in the requirements phase.65% similar
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