Tailgating cases
Tailgating detection monitors a short time window after each door unlock to identify unauthorized entries.
When tailgating incidents are created
Tailgating incidents are triggered in several specific scenarios where unauthorized entries are detected during the monitoring window.
Single unlock with multiple entries
The most common tailgating case happens when one person unlocks a door but multiple people enter. For example, if someone badges in and two people walk through together, the system creates a tailgating incident for the second person.
When multiple tailgating incidents occur after a single unlock, Kisi creates one incident report containing all occurrences, with each occurrence including its own photo evidence under Occurrences in the report.
Multiple people unlocking separately
When people unlock the door more than 10 seconds apart, each unlock is treated as a separate event. If two people unlock separately but then enter together, this creates a tailgating incident because only one person was authorized by each unlock. Multiple people entering after any single unlock will trigger tailgating incidents for the additional entries beyond what was authorized by that specific unlock.
Separate incidents from different unlocks
If two separate tailgating incidents occur within the short monitoring window, each incident is linked to its respective unlock event and user. For example, if User A unlocks and causes a tailgating incident, then User B unlocks later and also causes a tailgating incident, the system creates two distinct incidents, one attributed to User A and another to User B.
Group unlocks with excess entries
When multiple people unlock the door within 10 seconds of each other, this is considered a group entry. Each unlock in the group allows one person to enter without triggering tailgating. However, if more people cross than there were unlocks in the group, tailgating incidents are created for the additional entries.
Exits during the monitoring window
When someone exits through the door during the short monitoring window, it doesn't reset the tailgating detection. The system continues monitoring for additional entries that weren't authorized by the original unlock.
For instance, if someone unlocks the door, one person enters, another person exits, and then a third person enters, Kisi still creates a tailgating incident for the third person since their entry wasn't authorized.
Entry after someone exits
If a person unlocks the door and someone immediately crosses out (the first line-crossing is an exit), any subsequent entries will trigger tailgating incidents. The unlock authorization isn't "saved" for an entry, so anyone entering after an exit is considered unauthorized.
Request to exit tailgating
When someone presses an exit button (request to exit) to unlock the door from the inside and then other people enter from the outside without authorizing first, tailgating incidents are created as anonymous events. Since request to exit actions aren't linked to a specific user, any resulting tailgating incidents cannot be attributed to a particular person.
When tailgating incidents are not created
Tailgating incidents are not created when:
- Each person entering has their own corresponding unlock event
- Multiple people unlock the door within 10 seconds of each other and the same number of people enter (group entry)
- A scheduled unlock/lock occurs - scheduled events reset the monitoring window and allow unrestricted access during the scheduled period