The primary purpose of conducting review of literature is to develop the theoretical framework of study by defining the concepts and terms in relation to the study. Review of literature plays a principal role in every research at any level since it provides a thorough introduction on the topic and presents all the analyses and findings of previous studies which eventually help to establish a conceptual frame work to govern the overall research in a conceptually grounded manner.
To accomplish this purpose, the chapter as a whole has been designed in four sections. In the first section, the present researcher has performed relevant theoretical reviews, followed by reviewing government policy document in second section of this chapter. The third section consists of the review of related studies. Finally, the fifth section of this chapter presents with conceptual framework of the study which will govern the overall research in a theoretical grounded manner.