A case selection that is based on representativeness will seldom be able to produce these kinds of insights. Case study method results in fruitful hypotheses along with the data which may be helpful in testing them, and thus it enables the generalised knowledge to get richer and richer.
Characteristics of Case Study method The important characteristics of the case study method are as under: Under this method the researcher can take one single social unit or more of such units for his study purpose; he may even take a situation to study the same comprehensively.
For instance, under this method we not only study how many crimes a man has done but shall peep into the factors that forced him to commit crimes when we are making a case study of a man as a criminal. The object of the case study method is to locate the factors that account for the behaviour-patterns of the given unit as an integrated totality.
The research may also continue for an extended period of time, so processes and developments can be studied as they happen. Mention may be made here of the important advantages. Case study method enhances the experience of the researcher and this in turn increases his analysing ability and skill.
For example, Freud has been criticized for producing case studies in which the information was sometimes distorted to fit the particular theories about behavior e. These are primarily descriptive studies. Alternatively it may be chosen because of researchers' in-depth local knowledge; where researchers have this local knowledge they are in a position to "soak and poke" as Richard Fenno put it,  and thereby to offer reasoned lines of explanation based on this rich knowledge of setting and circumstances.
Cases reflect the ambiguity and complexity that accompany most management issues.