What has been done in your field of research? What principles of selection are you going to use?  How are you going to order your discussion? Pure Theoretical, Practical, or Conceptual? What section...

What has been done in your field of research? What principles of selection are you going to use?  How are you going to order your discussion? Pure Theoretical, Practical, or Conceptual? What section headings will you use?  How do the various studies relate to each other? What precise contribution do they make to the field? What are their limitations?  How does your own research fit into what has already been done?