How to describe a simulation, or from what point of view to observe a simulation? There are a few popular modes. These are called world views.
Only one sanp-shot (the current one) is kept in computer memory. A new snap-shot can be derived only from the previous snap-shot, newly generated random variable values, and the event logic. Past snap-shots should be ignored when advancing the clock. The current snap-shot must contain all information necessary to continue the simulation.
We will see more examples later.
See Figure 3.4 on page 69 for an example. From the view point that two processes interact with each other.
Often specialized simulation package can support this view. These simulation packages take care of the time advancing issues for the programmers. Programming in general purpose high level language is difficult to use this process-interaction world view because it will be too complicated for programmers to specify all the details.
See Figure 3.4 on page 69 for an example. From the view point that activities and conditions.