The priorities of a research design can vary depending on the field, but you usually have to specify:
Your research questions and/or hypotheses
Your overall approach (e.g., qualitative or quantitative)
The type of design you’re using (e.g., a survey, experiment, or case study)
Your sampling methods or criteria for selecting subjects
Your data collection methods (e.g., questionnaires, observations)
Your data collection procedures (e.g., operationalization, timing and data management)
Your data analysis methods (e.g., statistical tests or thematic analysis)