1. A process for providing a representation of specified characteristics of a previously developed object-oriented software program, said program including a number of object classes and further including object related methods belonging to respective classes, said process comprising the steps of: sensing at least one complex method call included in said software program, a plurality of said methods being associated with each of said complex method calls; extracting a number of single method calls from each of said complex method calls; generating a set of information for each of said methods from said single method calls, the information set for a particular method containing at least the name of the particular method and the class to which the particular method belongs; and constructing a representation of interactions between objects of said software program from the information contained in said method information sets.