When OOAD was in the birth phase, There were different 
different ways to define the OOAD consepts.
Before 1994 there were different methodologies like 
Rumbaugh, Booch, Jacobson, Meyer etc who followed their own 
notations to model the systems. The developers were in a 
dilemma to choose the method which best accomplishes their 
needs.     This particular span was called as ?method-wars?.