'The Wi-Fi is slow' is a starting point, not a diagnosis. In a public library or shared service building, the same description can refer to a particular room, a busy period, one application, or an individual device.
Collect comparable observations
Ask where the issue happens, what the person is trying to do, and whether it occurs at a repeatable time. Record the device type and whether nearby users report a similar problem. A simple floor-plan note can reveal a pattern that disappears in a long email exchange. Avoid collecting personal browsing details when a task description is enough for the investigation.
Check the whole service path
Have the responsible team compare observations across the wireless connection, supporting network, and application. Adding an access point is only one possible response and should follow the findings. Test again using the same location and task so the team can compare like with like. Share a plain-language update explaining what was checked and what remains unresolved.
Practical takeaway
Use consistent observations to narrow the question. A repeatable complaint is easier to investigate than a general impression that an entire building needs more wireless equipment.