To limit the probability that deficiencies in the system [with respect to the 2-way communication from each floor area to the central alarm and control facility] will go unnoticed, which could lead to corrective action on such deficiencies not being taken, 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.