Method of Coupling Metrics for Object-Oriented Software System Based on CSBG Approach

Table 1

The first part of existing methods for coupling measurement.

Method	Description
CBO [11]	; the metric is 1, if method in one class invokes other classes or is attributed to another class, otherwise it is 0
[12]	; this is similar to CBO method; however, that does not consider inheritance
RFC [13]	, which is used for calculating the number of methods responding to an object’s message
RFCα [13]	, , that is, a set of polymorphic methods invoked by functions in set ; then with
[13]
MPC [13]	; this calculates the number of static method invocation of classes
DAC [14]
[14]	; this formula is similar to DAC; however, if there is a relationship between classes, the metric is 1, otherwise the metric is 0