Here’s my professors’ comments, and attached with more in article comments. At

Here’s my professors’ comments, and attached with more in article comments.
At present, the research question is good, but there is no detail in the proposal that really addresses who you will answer that question. What economic models are you attempting to demonstrate the presence of, or transformation from one economic system to another? What data will you use, specifically. It is not enough to say, coins, glass, pottery, and metalwork will answer the question. They have not done so for other scholars to date – why is that? Is it that there is too little data? Is it that they have not considered the problem with an economic perspective? Have previous scholars focussed on too narrow or limited a range of data?
I would also note there is not specification of the chronological range of your proposed research. That is really important, as it specifying the geographical parameters. Hadrian’s Wall is a well defined area, but the kingdom of Northumbria is much larger and varies in size depending on what date you are talking about.
The other aspect that is still absent, is a demonstration that you have a good command of the underlying conceptual issues. For example, while the research context talks a bit about Hadrian’s Wall and late Roman material culture, there is no mention of the kingdom of Northumbria or its origins. To support your research question, you also need an argument or link that connects the late Roman garrison of Hadrian’s Wall to the kingdom of Northumbria. At present, they are two separately floating concepts. Similarly, you do not really talk much about economics or economic impacts until your methodology section. The current state of research and understanding of economics for Hadrian’s Wall and Northumbria need to be addressed in the Research Context section.
As I think I’ve tried to explain previously, the Research Context section should be a succinct and very critical review of the current state of research as it relates to your research question. It should not be general, but quite specific. What are understood/argued at present, and on what basis. What is the problem with that current knowledge/state of research? For example, at present, very few scholars credit the late Roman frontier or army of Central Britain as having any impact or effect on the formation of Northumbria (I am the exception in this regard), with a more typical view divorcing any Roman cultural impact/significance on early Northumbrian culture (e.g. Rollason and Halsall); even Christianity as seen as something taken up by Northumbrian royalty from outside influences (e.g. Oswald and Dal Riata/Iona). Why is this view problematic? How will your research challenge this view? How will your view be unique/different and advance scholarship?
Having established a good critique of current research, Methods allows you to specify which sites and datasets you will make use of. What theoretical and or conceptual frameworks will you apply to enhance interpretation. What specific methods in GIS or statistical analysis will be used with your data? What is the timeline for your overall research project?
Given that your research question names economic impacts or contributions, your Research Context needs to critique current research from this perspective, and your Methods should also demonstrate how your data will conform to economic analysis and modelling.