Most Code Reviews Catch 20% of Defects. Fagan Inspections Catch 90%.
Informal code review catches 15-30% of defects. Fagan inspections, a structured 50-year-old process, consistently report 60-90% removal rates.
Most code review catches between 15 and 30 percent of the defects it was supposed to find. That is not a guess. IBM measured it in the 1970s, and studies at…