Error Density Metrics

adminSoftware Testing

Table of Contents

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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