
85Software Metrics
Lee etal. (1995) proposed information ow-based cohesion (ICH) metric. ICH for a class is
dened as the weighted sum of the number of invocations of other methods of the same
class, weighted by the number of parameters of the invoked method.
3.5.4 Inheritance Metrics
The inheritance represents parent–child relationship and is measured in terms of num-
ber of subclasses, base classes, and depth of inheritance hierarchy by many authors in
the literature. Inheritance represents form of reusability. Chidamber and Kemerer (1994)
dened depth of inheritance tree (DIT) metric as maximum number of steps from class to
root node in a ...