
33Central Concepts
and all the events that were determined to have occurred are assigned the
current time (i.e., whatever it is at the end of the interval).
The process of periodic checking is conceptually simple (Figure 2.4).
Atthe end of each period, the model goes through the list of individuals in
the simulation during that interval (i.e., all those who started the interval)
and determines for each one if any of the events happened during the period.
Events that are determined to have occurred are dealt with as appropriate,
the clock is moved ahead another period, and the process repeats until the
model ends. For example, after a number ...