While there are many safety and security products on the market to help with access control and incident response, perhaps the most effective method is simple: incident response training and awareness.  Most safety and security training focuses on the problems rather than solutions. Shifted attention away from real world solutions leaves people with the same questions they came with, in addition to a host of other concerns.
Focus on identifying a simple method to empower your staff’s options in an active crisis situation, one that will increase their risk awareness, avoidance, and response timing. The key is to prepare them with options that they could use in virtually any situation. The “run, fight, or hide” is perhaps the most effective method to deploy for any type facility.