What is the best-known performance standard for guidance on the criteria of effective locking systems?

The best-known performance standard for guidance on the criteria of effective locking systems is Underwriters Laboratories (UL). UL is recognized for establishing safety and performance standards for a wide variety of products, including locking devices. Their certification process evaluates the durability and effectiveness of locking systems under specific conditions, which provides confidence to consumers and manufacturers alike in the security features of the products tested.

Understanding the significance of UL standards helps security professionals and organizations make informed decisions about the locking mechanisms they employ, ensuring that they meet industry standards for reliability and effectiveness. This is particularly crucial in environments where security is paramount, as UL standards help define what constitutes a secure locking system and ensure that products are rigorously tested and certified.

The other entities listed either do not specialize in performance standards for locking systems or are not widely recognized for this specific purpose.