Practical guides for people who don’t create surveys every day.
Ask at the exit when you need to hear from whoever was in the building. Keep those answers separate from the email ones and compare them before you merge.
Willing people leave while one visitor finishes on the only screen. Give the people who were actually at the door a chance to answer.
In-person answers still count when a collector watched them. Keep every check on the public link.
In Candor, turn on data entry mode for the survey your collector carries, so one tablet can take answers from visitor after visitor.