Entry and exit to premises are usually controlled by an access and egress control system. The functions of such a control system could include the following:

1. Monitoring and recording the entry and exit of individuals to and from the premises.
2. Restricting access to authorized personnel only through the use of key cards, PIN codes, or biometric authentication.
3. Providing real-time alerts and notifications in case of unauthorized access attempts.
4. Integrating with other security systems such as CCTV cameras and alarms for enhanced security.
5. Managing and controlling visitor access by issuing temporary access credentials.
6. Generating reports on access logs and activities for audit and compliance purposes.
7. Automating the process of unlocking and locking doors at designated times.
8. Integrating with building management systems for seamless operation.
9. Providing remote access control capabilities for administrators to manage access from anywhere.
10. Ensuring compliance with safety regulations and emergency evacuation procedures.

- Identification: Verifying the identity of individuals attempting to enter or exit the premises. This can be done through the use of access cards, keypads, or biometrics.
- Authorization: Determining whether or not an individual is authorized to enter or exit the premises. This is typically done by comparing the individual's identification to a database of authorized personnel.
- Recording: Keeping a record of all entries and exits. This information can be used for security purposes, such as tracking down individuals who are not authorized to be on the premises.
- Monitoring: Monitoring the flow of traffic through the premises. This information can be used to identify potential security risks, such as unauthorized access or overcrowding.
- Controlling: Controlling the physical access to the premises. This can be done through the use of turnstiles, gates, or other physical barriers.