Do I need to use more than 1 business model

Hello All,

I have pretty much completed my OBU RAP but I have used a PESTLE analysis as my one and only business model and link it back to the ratio analysis etc.

I was wondering, is it compulsary to use more than one business model such as SWOT & PESTLE or can I go with an in depth PESTLE analysis?

Mine is pretty in depth but my tutor has raised concerns that I may need to build in a SWOT too.