SIA licensing is the baseline, not the differentiator. Assignment instructions and a genuine 24/7 control room are what change outcomes.
Any compliant provider can supply SIA-licensed officers. What varies enormously is how well those officers are briefed for your specific site.
A site-specific assignment instruction — access routes, escalation contacts, known risks, patrol points — turns a body on a chair into a security function.
Behind that sits the control room. Ask to call it at 3am before you sign; the response tells you everything.
Reporting closes the loop: incident logs, patrol evidence and a monthly review that feeds changes back into the assignment instruction.