“…These programs may be divided into two major types: models that study how the movement of people is produced under normal non-emergency conditions (the precursors of which were Predtechenski and Milinksii [18], and subsequently Fruin [19], which, applied to areas with a large number of people and on stairs, gave rise to movement models such as PEDROUTE by Buckmann and Leather [20]); and evacuation models (which are more recent, some of the first studies being those by Stahl [5]). The latter type of model may in turn be classified into those that only consider deterministic movements (people are assumed not to think in a personal way, but react automatically to external stimuli, exiting as quickly as possible when the event occurs, at a specific speed, etc., which is how the model by Takashi et al functions), and models which also consider physical features, those relating to the behavior of people, treating them as individual agents with different reaction times, preference for certain exits, etc.…”