Write down every single device: MCPs, Smoke detectors (addressable), Heat detectors, Beam detectors, Sprinkler flow switches, VESDA (air sampling).
Write down every controlled device: Sounders, Beacons, Magnetic door holders, Fire shutters, AHUs, Gas valves, Elevator recall relays, Fire phone taps.
Because when the smoke clears, the only question that matters is: Did the building do what it was supposed to do? The matrix holds the answer.






