What are the common elements necessary to accomplish various security tasks?

Protecting buildings and grounds, enforcing rules and regulations, directing foot and vehicular traffic, supervising systems, conducting inspections, controlling access, reviewing safety inspections, maintaining orderly operation, recording and reporting relevant information

Building and perimeter protection, intrusion and access control, alarm and surveillance systems, fire prevention and control, emergency and disaster planning, prevention of theft, accident and safety protection, enforcement of rules, regulations, and policies

Conducting inspections of packages and vehicles as required, controlling access of people, product and vehicles onto the site, exiting the site and within the site, enforcing rules and regulations related to security in and around the site, supervising and enforcing all systems designed to monitor or identify personnel and vehicles entering the site or sectors within the site