Software Defect Prediction Based on Elman Neural Network and Cuckoo Search Algorithm

Table 3

Description of object-oriented metrics.

Variable	Description
CK suite (6)
wmc	Weighted methods per class
Dic	Depth of inheritance tree
Noc	Number of children
Cbo	Coupling between object classes
rfc	Response for a class
Lcom	Lack of cohesion in methods
Martins metrics (2)
Ca	Afferent couplings
Ce	Efferent couplings
QMOOM suite (5)
npm	Number of public methods
dam	Data access metric
Moa	Measure of functional abstraction
Mfa	Measure of aggregation
cam	Cohesion among methods
Extended CK suite (5)
Ic	Inheritance coupling
Cbm	Coupling between methods
Amc	Average method complexity
lcom3	Normalized version of LCON
McCabe’s CC (2)
max_cc	Maximum values of methods in the same class
avg_cc	Mean values of methods in the same class
Loc	Lines of code
Bug	Nonbuggy or buggy