Employees used to sign into a log before they entered the building and this was the way that we kept track of everyone.
When employees signed into the log when they entered, we knew who was in the building. Employees had to sign the log when they left the building as well. It was a great system to keep track of everyone in the office until I found out that security guards and employees were signing people in even though they were not in the building. When I realized that people were subverting the system, the first thing I did was talk to my IT company about the problem. The IT experts recommended a card access system to add an additional level of security. A card access system can be extremely helpful when you have an office with several employees. A card access system restricts access to the building unless you swipe an electronic card. Each person in the building has a unique electronic card stamp. I also put a CCTV in the lobby, so we can see who enters and exits the building. If there are any questions about the user of the key card, we can look at the security tapes for that time to see who was going in and out of the building. The keycards and access system work for the front door and we also have access readers at the elevators, rooftop, and the conference center. Automated security features help me keep track of my employees and what they are doing from one day to the next.