What are the components of a high quality literature review?

One of the most important chapters of a dissertation is the literature review. The literature review chapter has high priority because of the weighting of this chapter with respect to the number of words and the overall grade. A dissertation may be awarded a distinction or may be rejected mainly due to the quality of the review of literature. The Literature Review chapter covers a critical review of various studies and researches conducted in the past which are relevant to the research area of the dissertation. It should be kept in mind while writing this chapter that a critical perspective is required and not just an explanation of the various theories and concepts found in different sources of literature. Another important aspect to consider is the relevancy, recentness and reliability of the literature being reviewed. The literature review can only be written in high quality if it is critical in nature and the most recent, reliable and relevant sources are used.