Should a fire occur in which occupants are exposed to fire effluent and/or heat, the objective of the fire safety engineering strategy is to ensure that such exposure does not significantly impede or prevent the safe escape (if required) of essentially all occupants, without their experiencing or developing serious health effects.

This part of ISO 13387 is intended to provide guidance to designers, regulators and fire safety professionals on the engineering methods available to evaluate the location and condition of the occupants of a building exposed to a fire.

This part of ISO 13387 addresses the assumptions that underlie the basic principles of designing for life safety and provides guidance on the processes, assessments and calculations necessary to determine the location and condition of the occupants of the building, with respect to time.

This part of ISO 13387 also provides a framework for reviewing the suitability of an engineering method for assessing the life safety potential of a building for its occupants.