2.1 In order to facilitate their use, the parameters
are grouped into the same 4 categories as used in other industrial
fields, namely: GEOMETRICAL, POPULATION, ENVIRONMENTAL and PROCEDURAL.
2.2 Category GEOMETRICAL: layout of escape routes,
their obstruction and partial unavailability, initial passenger and
crew distribution conditions.
2.3 Category POPULATION: ranges of parameters
of persons and population demographics.
2.4 Category ENVIRONMENTAL: static and dynamic
conditions of the ship.
2.5 Category PROCEDURAL: crew members available
to assist in emergency.