This method is often a stronger one organizationally, and it can help you resist the urge to summarize your sources.
By grouping themes or topics of research together, you will be able to demonstrate the types of topics that are important to your research.
If your audience knows less than you do on the topic, your purpose is instructional.
If the audience knows more than you do, your purpose is to demonstrate familiarity, expertise, and intelligence with the topic.
Use an overall introduction and conclusion to state the scope of your coverage and to formulate the question, problem, or concept your chosen material illuminates.
Usually you will have the option of grouping items into sections—this helps you indicate comparisons and relationships.
Length The length of a literature review varies depending on its purpose and audience.
In a thesis or dissertation, the review is usually a full chapter (at least 20 pages), but for an assignment it may only be a few pages.
A literature review is a survey and discussion of the literature in a given area of study.
It is a concise overview of what has been studied, argued, and established about a topic, and it is usually organized chronologically or thematically. It is not an annotated bibliography, because it groups related works together and discusses trends and developments rather than focusing on one item at a time.