Therefore, the class distribution follows the Pareto principle, in
the sense that the 20% larger classes in term of LOC contain
about 80% of all the code, as shown in Table 3. Similarly, the
20% larger classes in terms of WMC contain almost 80% of all
the cyclomatic complexity. Per the Pareto principle, the analysis
will be limited to these 20% larger classes, based on the
assumption that the smaller classes do not have a major impact on
the quality of the complete system. Therefore, 20% of 42
implemented classes represent a total of 8 classes.