PURPOSE AND SCOPE - LITERATURE SEARCH:

There are many  purposes for  reviewing the literature before  conducting a research study. The most  important one  is: 

To  determine what  is already known about the topic  that you plan  to  study. To get background for understanding what  has been already done and illuminate the same  for new study.  

The research studies have recommendation for future research, which can be  taken for new  research.

To  help locating theoretical  and conceptual framework and related data which need  to be included in the present study. That help  to plan the research methodology, design, selection of  tool, sample and plan for statistical analysis. 

To  find the comparative data  that could be used for  suppofting present findings and drawing conclusions. 

To minimize  the possibility of unintentional duplication about the problem for study  and  increasing the possibility  of new  study, which makes distinctive contribution  to knowledge. 

Scope: Review  of  literature generally begins with a research problem in mind. Occasionally literature review will  help  to  select the topic. Previous research studies will decide  to  replicate the existing study and  to  examine another aspect of  the problem. The review of literature  is  necessary, so that to narrow the problem to  be  studied. The researcher may be able  to  capitalize on successes as well as the errors  of other  investigators.