Most facilities I walk into believe they have access control because they have a badge reader at the front door. They don't. They have a door that beeps. Access control is a system of people, procedures, and technology working together to make sure that only the right people get into the right places at the right times — and the weakest link is almost never the hardware.
The breach you should worry about isn't someone defeating a magnetic lock. It's tailgating: a polite, well-dressed stranger walking in three feet behind an employee who holds the door because that's what decent people do. No alarm fires. No log entry is created. The intruder is simply inside, and now your entire perimeter is irrelevant.
Officers and employees are trained that holding the door for a stranger is a security failure, not a courtesy. Visitors are met, logged with a name and a verifiable reason for the visit, issued a clearly distinct temporary badge, and escorted or monitored. Credentials are tied to a specific person and a specific access level, and they're revoked the same day someone is terminated — not next week when HR gets around to it. Doors that are propped are treated as incidents, not annoyances.
A visitor log that's three months behind. Badges shared between shifts "because it's easier." A terminated employee whose card still works for a month. A back door propped open with a fire extinguisher every afternoon so the smokers don't have to badge back in. Every one of those is an open door with a professional-looking lock bolted to it.
The fix isn't more technology — it's discipline around the technology you already have. Audit your active credentials quarterly and kill the orphans. Run an unannounced tailgating test: have someone your staff doesn't recognize try to walk in behind an employee, and see how far they get. The result will tell you everything about whether you have access control or just a door that beeps.