This document discusses the process of conducting a literature review to identify research gaps. It begins by outlining the steps in literature review including identifying published and unpublished work, evaluating it, and documenting it. It then discusses the importance of literature review in discovering, determining, understanding the research topic. Different types of scientific literature are described like primary, secondary and tertiary sources. The steps in problem definition process are explained including understanding the business situation, identifying problems and symptoms, writing decision statements and research objectives. Methods for literature search and evaluation of information sources are also summarized.