IfSQ

Code Inspection Boosts Productivity

When preparing for code reviews, developers find the majority of bugs that would otherwise be found by testers and users.

Research has yielded these findings:

• A study of 13 reviews at AT&T found that the importance of the review meeting itself was overrated; 90% of the defects were found in preparation for the review meeting and only about 10% were found during the review itself.
• IBM found that each hour of inspection prevented about 100 hours of related work.
• As much as 90% of development effort on a typical software system comes after its initial release, with two-thirds being typical.
• Designers and programmers learn to improve their work through participating in inspections and inspections improve productivity by 20% or more.