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| | You Can't Afford Quality?- Finding and fixing a software problem after delivery is often 100 times more expensive than finding and fixing it during the requirements and design stage
- Current software projects spend 40 to 50% of their time on avoidable rework
- About 80% of avoidable rework comes from 20% of the defects
- About 80% of the defects come from 20% of the modules and about 50% of the modules are defect free
- About 90% of the downtime comes from, at most, 10% of the defects
- Peer reviews catch 60% of the defects
- Perspective based reviews catch 35% more defects than non-directed reviews
- Disciplined personal practices can reduce defect introduction rates by up to 75%
- 40 to 50% of user programs contain non-trivial defects
"Software Defect Reduction List", Computer Magazine, Jan 2001, Barry Boehm and Vic Basili |
