I don't see any way to access the comment on the survey. (to read what has been edded). Perhaps this is just a form issue. From what I could tell, there was not a summary screen for the surveys, just a list of the surveys that you could go into and review each one and each one could have an overall rating calculated from the fields, but I didn't find a way to combine the results of say 10 surveys and get an average of each of the questions. I also didn't see a way in the maintenance to select surveys for a period however I am sure their must be. I did see how you could select for an individual and it would give you a total line, but there was no avarage line, but again, I am pretty sure that could be added (just no seeing where/how at the present).
I did not see a way to add the amount of time spent on a project (just noted that the time spent was based on the amount of the the incident was open (so you would have to have the incident open the entire time you worked on the project).