Intermittent failures can be difficult because equipment may appear to operate normally when a technician arrives. Hotels should record when the issue occurs, how long it lasts, what the guest or employee was doing, environmental conditions, network activity where relevant, and what restores normal operation.

Repeated observations can reveal triggers that would otherwise remain hidden. Logs, system monitoring, photos, videos, error messages, and timestamps can be particularly valuable when problems cannot be reproduced on demand.