Math Help - Statistics ( Survival Analysis)

Hi,
I have been having some problems with survival analysis ,
Question asks to mention assumptions and limitations of survival analysis , i have got some assumptions , cant find more and can't find any limitations at all except for one or two obvious ones
Any help will be appreciated

Also characteristics of data sets required for calculation of survival analysis

Will

What have you got so far? Can you mention things like censoring/truncation and problems with commonly used models/how to deal with them?