Inheritance Hierarchy Based Reuse & Reusability Metrics in OOSD

ion level (OptimizationAnalyzer, DesignOptimizationAnalyzer and UserInterfaceOptimizationAnalyzer) and the abstraction level of OptimizationAnalyzer, DesignOptimizationAnalyzer and UserInterfaceOptimizationAnalyzer is 3 , 2 and 1 respectively then their GC is 3/3,2/3 and 1/3 respectively. OptimizationAnalyzer class is having the highest value of GC therefore; it is more reusable as compared to other two classes. Comparison with existing Metrics DIT metric considers only depth of a class in inheritance tree and takes higher depth as indicator of higher reuse. DIT does not consider characteristics of the class whereas GC considers the generality of the class a feature of reusability. However the relationship may exist between GC and DIT metric. A class with a small DIT has much potential for reuse it tends to be a general abstract class[14]. As classes at higher depth are more specific as compare to the classes at lower depth therefore, higher depth indicates less abstraction level. 5) Reuse Probability (RP) It is the probability of reusing classes in the inheritance hierarchy. It can be computed as follows