The document discusses writing the research design section of a thesis. It explains that the research design justifies the structure and reasoning behind the investigations, not just describing what was done. It discusses the differences between the methodology and methods sections. The methodology explains the reasoning and thinking behind the choice of methods, while methods details the procedures. Both sections require justifying decisions through the literature. The document provides guidance on how to explain and defend the chosen research approach over alternatives in the methodology section. It emphasizes showing how the chosen method will best address the research problem. The methods section should provide enough detail to allow others to replicate the work.