Does your organization use ‘cost per defect’ for software quality?


If you do, this is not a good idea.

For software, the cost-per-defect-metric has developed into an urban legend, with hundreds of assertions in the literature that early defect detection and removal is cheaper than late defect detection and removal by more than 100 to 1.

This is true mathematically, but there is an economic problem with the cost per defect calculations.



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