Tailgating at the Turnstile During Shift Change
At 06:55, during shift change at a 4,000 m² beverage warehouse, guard Anita watches on the loading-bay camera as two men in hi-vis vests pass through the staff turnstile on one badge swipe, then walk toward the syrup store. The second man's badge was a visitor pass issued yesterday to a refrigeration contractor and it expired at 06:00 today. The syrup store is a CCTV blind spot because a pallet of shrink-wrapped cans has been parked in front of the camera since Tuesday. Anita is alone at the gate; her relief is 200 m away at the vehicle gate; the production line starts at 07:00 and 12 tanker drivers are queuing outside. The site's access-control SOP requires: one badge, one person; visitor passes re-validated daily; and no contractor in the syrup store without an escort.
1. Anita is alone at the gate when she sees the two men pass the turnstile on one swipe. List her actions in priority order for the next ten minutes and justify the sequence.
Read the worked answer
Priority order for the next ten minutes:
- Keep the gate staffed. Anita must not chase two unknown men and leave the gate open with 12 tankers outside. Radio the relief guard or supervisor immediately and ask them to intercept at the syrup store and alert the production supervisor.
- Challenge from the gate over PA/radio: describe the two men, state that the second visitor pass expired at 06:00, and ask them to stop and return to the gate.
- Verify if they comply - badge, photo, contractor permit list, escort requirement. If the pass is expired, they are not authorised; escort them out and record names.
- If they refuse, call the site manager and police; do not attempt a physical detention alone unless a cognizable offence is clearly in progress, and even then only minimum force.
- Once relief is at the gate, check the syrup store, note any missing stock, and preserve CCTV.
- Log everything - times, badge numbers, camera channel, action taken - before the shift ends.
2. Identify at least four access-control weaknesses in the setup and propose a specific fix for each.
Read the worked answer
Four weaknesses and fixes:
- Tailgating at the turnstile - one swipe, two people. Fix: enable the anti-passback or double-entry alarm, mount a camera directly above the turnstile, and post the guard to observe it during shift change; brief staff that holding the gate for a colleague is a disciplinary matter.
- Expired visitor pass still accepted - the pass expired at 06:00 but the man was inside at 06:55. Fix: visitor passes auto-expire in the system at the stated time, are colour-coded by day, and are re-validated at the gate each morning; contractor names checked against the permit list.
- Camera blocked since Tuesday - a pallet in a marked camera zone. Fix: paint the zone, prohibit storage there, and add a camera check to the shift-start checklist with a named person signing it.
- Single guard at the gate, relief 200 m away - no cover at the busiest moment. Fix: stagger meal breaks, issue radios, and place the relief at the gate during 06:45–07:15.
- No escort in the syrup store - fix with an escort log and door control.
3. The production line starts at 07:00 and 12 tanker drivers are queuing. How should Anita manage the queue without weakening access control?
Read the worked answer
Do not trade access control for queue speed. The 12 drivers are a pressure tactic, not a reason to stop checking.
- Bring the relief guard to the vehicle gate and open a second checking position, so two drivers can be processed at once while the pedestrian gate stays covered.
- Use a pre-printed driver register (name, licence, vehicle number, consignor, time in/out) so each check takes seconds; check one driver at a time at the barrier.
- Tell the queue the expected delay and why - most drivers accept a visible process.
- If production insists on priority, the warehouse supervisor can sequence the queue, but the guard still checks every licence and vehicle; a supervisor's verbal "let him through" does not override the SOP without a written exception.
- Record the queue length and any pressure applied, so the staffing gap is visible at the next review.