Defect Density

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The number of defects identified in a product divided by the size of the product component, expressed in standard measurement terms for that product. [ CMMi ]

Other Definitions

Defect Density [ ISO/IEC/IEEE 24765
number of defects per unit of product size. Example: problem reports per thousand lines of code.
Defect Density [ Team Software Process
number of defects injected or found in one or more phases divided by the product size.


  • By normalizing quality in terms of product size, defect density measures enable comparison of the various products and the processes that produced them. Defect density measures are also used to establish quality goals, measure quality performance, and compare processes and products. [ Team Software Process ]

See also



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