Which statement about the Sequence of Operation Matrix describes its use is NOT true?

Which statement about the Sequence of Operation Matrix describes its use is NOT true?

• A. It is used by the AHJ to determine how the system will function during acceptance testing.
• B. It is used by the technician when programming how the system will operate.
• C. It is a logic diagram that is part of NFPA 72 documentation.
• D. It provides a history log of maintenance activities.

Answer: (D)

The Sequence of Operation Matrix is a detailed map of how the fire alarm system should respond to different inputs, showing the sequence of actions, interlocks, time delays, and outputs for each event or condition. It’s a design and commissioning tool that helps everyone understand exactly how the system should behave in normal operation, during alarms, supervisories, and troubles. Because it documents the intended behavior, it’s used by the AHJ during acceptance testing to verify the system will function as specified, and it’s used by technicians when programming the system so the software and hardware follow the intended sequence. NFPA 72 includes this kind of logic diagram as part of the documentation to ensure a consistent understanding across installers, testers, and authorities having jurisdiction. What it does not do is provide a history log of maintenance activities. Maintenance records are separate documents that track service events, tests, parts replaced, dates, and personnel, not the functional sequence of how the system operates.

The Sequence of Operation Matrix is a detailed map of how the fire alarm system should respond to different inputs, showing the sequence of actions, interlocks, time delays, and outputs for each event or condition. It’s a design and commissioning tool that helps everyone understand exactly how the system should behave in normal operation, during alarms, supervisories, and troubles. Because it documents the intended behavior, it’s used by the AHJ during acceptance testing to verify the system will function as specified, and it’s used by technicians when programming the system so the software and hardware follow the intended sequence. NFPA 72 includes this kind of logic diagram as part of the documentation to ensure a consistent understanding across installers, testers, and authorities having jurisdiction.

What it does not do is provide a history log of maintenance activities. Maintenance records are separate documents that track service events, tests, parts replaced, dates, and personnel, not the functional sequence of how the system operates.