The length of the review depends on your objective.
The majority of these projects will require a selective examination of the literature. Discuss the length of your review with your instructor or paper advisor.
It will take time to locate and review the literature relevant to your research question. Starting early will allow you sufficient time to gather and review your sources. The process of writing a literature review normally includes the following elements:
1. Defining your research question
2. Planning the approach to your review and research
3. Searching the literature
4. Analyzing the material you find
5. Organizing the review
6. Writing the review
This video provides an overview of the literature review process.