IfSQ

Inspection 4 to 7 times faster than testing

Research Finding:
The average cost of finding an error using code inspections is 3.5 staff hours compared to 15-25 hours to find each error through testing.

Sources:

Comparing The Effectiveness of Software Testing Strategies

• Victor R. Basili, and Richard W. Selby
• Recorded 1987 in IEEE Transactions on Software Engineering, SE-13, no. 12, December
• Pages 1278-96

Software Inspections: An Effective Verification Process

• A. Frank Ackerman, Lynne S. Buchwald, and Frank H. Lewski
• Recorded 1989 in IEEE Software, 6, no. 3, May
• Pages 31-36