To limit the probability that deficiencies in the system [with respect to the audibility of loudspeakers] will go unnoticed, which could lead to corrective action on such deficiencies not being taken, which could lead to the loudspeakers not being heard in all or certain parts of the building, which could lead to the inability of the system to promptly notify persons in the building, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
To limit the probability that deficiencies in the system [with respect to the audibility of loudspeakers] will go unnoticed, which could lead to corrective action on such deficiencies not being taken, which could lead to the loudspeakers not being heard in all or certain parts of the building, which could lead to the inability of the system to promptly notify or communicate with emergency responders, which could lead to delays or inefficiencies in carrying out fire emergency response operations, which could lead to:
This is to limit the probability of harm to persons.