The research story
A reader should usually be able to see what problem or question the work addresses, how prior literature relates, what was done, what was found, what those findings mean, and what conclusions the evidence justifies. Those are jobs, not required chapter titles. The same concepts should stay aligned across the problem, the aim, the questions or objectives, the methods, the findings, the discussion, and the conclusion. A thesis should not claim more than its evidence supports. Do not invent findings, overstate novelty, hide a limitation, or invent an approval. There is no methodology guide on this page.
Research questions vs objectives is the guide to that alignment. This page does not repeat it.