The practical signal
A renovation, new landscaping, different opening hours or new staff can make an otherwise good system less usable without immediately displaying a error message.
An annual inspection is a time to assess not only malfunctions, but also changed risks, users and viewing angles.

A renovation, new landscaping, different opening hours or new staff can make an otherwise good system less usable without immediately displaying a error message.
Compare current cameras and targets with the current location. Check image, night vision, recording, disk, app, contacts, and physical mounting.
Plan restoration or adjustment based on findings and priority. Remove unused access and update documentation instead of performing only a visual cleaning round.
Record the date, findings, tested channels, and open actions. Check the functionality again after recovery and determine when the next review is needed.
It helps to make silent problems and changed circumstances visible in time.
An inspection also assesses recording, physical assembly, rights and documentation.