Error Density Metrics

Overview

In this post, we will calculate Error density metrics. The project information, error distribution numbers, and the error weights can be found at:

https://www.testingdocs.com/error-removal-effectiveness-metrics/

 

Errors Code Testing Development

 

Sample Defect Weights

Code Error Density(CED)

CED= \huge \frac{NCE}{KLOC}

 

NCE = Number of Code and Testing errors

KLOC = Thousand Lines of Code.

The project numbers in the provided link are. Lookup Table 1 for the number of errors detected in the Code and Testing phases.

NCE = \huge 40

KLOC= \huge 325

 

CED= \huge \frac{40}{325}  = \huge 0.12

Development Error Density (DED)

DED = \huge \frac{NDE}{KLOC}

 

NDE = Number of Development errors

NDE = \huge 15

 

DED = \huge \frac{15}{325}

= \huge 0.05       (rounded to two decimal places)

 

Weighted Code Error Density (WCED)

WCED = \huge \frac{WCE}{KLOC}

 

WCE= Weighted Code Errors

= \huge 21*(2) + 12*(5) + 7*(10) = 42 + 60 + 70

= \huge 172

 

WCED = \huge \frac{172}{325} = \huge 0.53

 

Weighted Development Error Density(WDED)

WDED = \huge \frac{WDE}{KLOC}

 

WDE= Weighted Development Errors

=\huge 6*(2) + 7(5) + 2(10) = 12 + 35 + 20

= \huge 67

 

= \huge \frac{67}{325} = \huge 0.20

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