Adding some points to the research proposal as requested by my supervisor in his

Adding some points to the research proposal as requested by my supervisor in his next email
So now, let’s work on your proposal. Your topic is appropriate, but we need to improve the proposal substantially. A typical PhD is expected to have three studies. You propose only one. Can you add two more studies, add their details, and accordingly adjust the research questions, objectives, and hypotheses? Typically, students under my supervision propose a systematic literature review, survey, and interview study.