In general, you must do a literature search and come up with the specific aims and objectives of your study in the first place.
The first and most important step in any research is to identify and delineate the research problem: that is, what the researcher wants to solve and what questions he/she wishes to answer.
A research problem may be defined as an area of concern, a gap in the existing knowledge, or a deviation in the norm or standard that points to the need for further understanding and investigation.
It also gives the negative points of the current situation in the area of the research, explains why these matter, and then proposes how the project at hand aims to solve it.
Usually while writing the problem statement, researchers use the 5 “W”s (Who, What, Where, When, and Why).