One major economic justification for security guards is that insurance companies (particularly fire insurance carriers) will give substantial rate discounts to sites which have a 24-hour presence; for a high risk or high value venue, the discount can often exceed the money being spent on its security program. This is because having a security guard on site increases the odds that any fire will be noticed and reported to the local fire department before a total loss occurs. Also, the presence of security guards (particularly in combination with effective security procedures) tends to diminish "shrinkage," theft, employee misconduct and safety rule violations, property damage, or even sabotage.
Security officers also perform access control at building entrances and vehicle gates by ensuring that employees and visitors display proper passes or identification before entering the facility. Security officers are often called upon to respond to minor emergencies (lost persons, lockouts, dead vehicle batteries, etc.) and to assist in serious emergencies by guiding emergency responders to the scene of the incident and documenting what happened on an incident report. In case of armed security officers, often they are required to respond like police officers until situation is under control and / or proper authorities arrive on the scene.
