The success of an operation is measured by the human factor
A successful operation is one that has been prevented or contained from creating vast human and physical damage. The security posture required for preventing and stopping the information gathering process lies in our counter terrorism doctrine which is offensive and begins outside our facility, borders and stems to hunt potential perpetrators in the planning phase of their attack. Perpetrators which are stopped and intercepted in this phase will not become active shooters/terrorists and will have critical information on their operations platform.
However, success is also measured by our ability to neutralize an event which has already started whereby our skills are measured by our containment capabilities. This defensive posture is part of the anti-terror doctrine.
A successful security apparatus will carry these activities through its human components and achieve adequate response levels if the human component is of great quality.