Software Testing

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

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

= $\huge 67$

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