A literature survey is not a collection of paraphrases from many sources instead it is a serious evaluation of previous researches with an aim to expand on the reasons for pursuing a particular research.
It is important to be critical while reviewing literature in research investigation because of three main reasons. First, to develop properly the research questions and develop once own approach. Secondly, to know most important issues and their relative contribution to the research. Thirdly, to write papers critically.
Critical reading and thinking during literature review helps to establish a theoretical framework and methodological focus for a research. Especially if the research is new, a critical literature review helps to design a proper methodology relative to what has been done before. Being
