Set out your argument(s) early in your dissertation, even in the first or second paragraph. This helps the reader know where the rest of your paper is going. A dissertation is not a detective-type story that only unveils the answer in the last chapter!During the process, the writer uses the literature review section to establish their own place in literature rather than to demonstrate they have read all available material. This section should be detailed and critical in the way it shows how previous works have overlooked or misrepresented some important aspect(s). It should be noted, however, that the most essential oversights to draw attention to are those you yourself address in your dissertation.More about this  https://primeessay.org/tips-on-writing-a-dissertation.html