The way that IIEF-5 works is to reduce the level of intimacy, since the questions are asked in an entirely impersonal app and the process can be conducted completely in private. The output of the process is to produce a numeric score and a rating (for example score = 16, rating is “mild to moderate erectile dysfunction''), which can then be discussed with a doctor.
The possible scores for the IIEF-5 range from 5 to 25, and the diagnosis is based on the scores: severe (5-7), moderate (8-11), mild to moderate (12-16), mild (17-21), and no ED (22-25).