To limit the probability that deficiencies in portable extinguishers will go unnoticed, which could lead to corrective action on such deficiencies not being taken, which could lead to portable extinguishers not operating properly when used in a fire situation, which could lead to the inability of the extinguishers to control or suppress a fire, which could lead to the spread of fire beyond the point of origin, which could lead to harm to persons.
To limit the probability that portable extinguishers will not be maintained at the level of performance originally intended, which could lead to the portable extinguishers not operating properly when used in a fire situation, which could lead to the extinguishers being ineffective in controlling or suppressing a fire, which could lead to the spread of fire beyond the point of origin, which could lead to harm to persons.