This is a recurring part of all research which can help students focus the research question and mission design. It will shorten the search for suitable data, images, maps, etc. A hypothesis is a testable statement about the research question. Because test results will either support or falsify it, a good hypothesis can guide research toward answers. A researcher makes a question testable by identifying variables and proposing a relationship among them.
Time limitation is an important factor to consider in shaping any research project.