11.5 Several Test Metrics

After our more general discussion on measurements and metrics, this section introduces concrete →test metrics, which are useful for the measurement of the test process or the evaluation of product quality.

Test metrics can be distinguished according to the different measurement objects under consideration, resulting in the following:

Test-case-based metrics

Test-basis- and test-object-based metrics

Defect-based metrics

Cost- or effort-based metrics

As already suggested in the metrics examples above, there are many metrics in which both absolute numbers (number of tested X) and ratio values (number of tested X / number of all X) are of interest.