So when I did my OW with PADI, I think I didn’t do an online questionnaire, it was just a questionnaire on paper that was given back to the instructor, if I remember correctly (maybe I am like that student and I don’t remember correctly )All that is already done, at least by PADI.
When I was a DM assisting in classes, an instructor I assisted regularly was investigated as a result of such a report. In response to such a question on a survey, a student had said that when they did the CESA, the instructor did not use a line. That was ridiculous. We always used a line, and we had DMs top and bottom to supervise students closely at all times. The student had misremembered, but that faulty memory caused the instructor enough grief that in subsequent classes he emphasized to the students to remember that a line was used during the CESA.
My students have sometimes share with me the kinds of questions they were asked.
Also for my AOW, where a minor incident happened, I was not given a questionnaire to fill: I decided to finish my AOW with another shop but wasn’t given an opportunity to give feedback on the first shop.
There will be always a few false positives/negatives because it’s based on student memory but I guess you want to look at people who are massive outliers on the mass of data?
I think that was 2017 however, maybe that changed?