Which aspect is critical for scalable access control systems?

The capability to expand functionality as needs grow is crucial for scalable access control systems because scalability ensures that a system can adapt to changing requirements over time. As an organization grows, its security needs may become more complex, requiring additional features such as increased user access levels, additional integration with other systems, or enhanced monitoring capabilities.

A scalable system allows for the easy addition of new components or features without requiring a complete overhaul of the existing infrastructure. This flexibility helps organizations maintain effective security measures while accommodating growth in size, technology, or operational requirements. Therefore, having a system designed to expand its functionalities aligns with the overall goals of management and maintenance in a growing business environment, making it a key characteristic of effective access control solutions.