Demonstrate why you are using some methods and why not using others.

The impact of austerity measures on prisons in England and Wales.

Title of the section Methods of social research. In this research proposal, you need to demonstrate an understanding of the methods.

Demonstrate why you are using some methods and why not using others.
Becoming familiar with these examples written for other purposes will give you a sense of the tone/approach/content/justification/reference to methods literature that is expected in a research proposal document, these examples will give you insight into how others have tackled the task of writing a proposal.