Access control addresses a prime need: to avoid potential hazards firsthand. Imagine an electric cabinet with a voltage line. How would you avert any accidents or mishaps to happen? You could choose to put a warning sticker at the door or inform everyone on the offshore installation about the potential dangers when dealing with this cabinet. But what about if people forget or can't see the warning sign for what reason ever? The best alternative would be to lock up the cabinet and grant access only to qualified personnel, which is the principle of access control regarding safety. To avoid potential harm, access to single objects (like cabinets or vehicles) as to rooms or areas is granted to a pre-qualified circle of people only.
Access control gives an overview of personnel at the premises
Access control provides operators with a piece of vital information: Who is actually on the premise? It is essential to know who is where - not only in case of an evacuation. The safety of any operation relies upon the information about the whereabouts of your personnel and external contractors. Does an area, zone, or room must be evacuated before operations can begin? Managers must postpone waiting activities until an area is declared clear. The consequence is delays and lower productivity.
Access control secures an area to authorized personnel
The most plausible reason for access control is to avoid trespass of unauthorized, sometimes hostile individuals. Automated gates with readers identify persons and grant or deny access according to the rights stored in the access database. Again, this principle applies to get access to assets like vehicles (like a crane or a seat in a helicopter) or zones in a compound.