Methodology is a theory of producing knowledge through research and provides a rationale for the way a researcher proceeds. It is the philosophical underpinning of a given research practice. The chapter that you write on methodology is your discussion of the theory upon which your research is based, and you will show that you understand it well. When you write your methodology chapter, you will engage another body of literature, the literature on research methodology. It is a different body of literature from what you engaged when reading the research literature for your literature review chapter.