As of 2012 software defect removal efficiency only averages about 85% in the United States and in most other countries. Usage of formal inspections is found in only about 10% of U.S. companies, while usage of static analysis tools is only found in about 35%, based on samples from among the author’s clients.
A combination of formal inspections, pre-test static analysis, and formal testing by certified professional testers using mathematically derived test cases can consistently achieve defect removal efficiency levels that top 95% and often top 99%. This should be the norm, and hopefully it will become the norm when the effectiveness of pre-test removal methods becomes more widely known
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