ABSTRACT
So far the only built-in GPSS/H function used was the uniform distribution* (and that was not the general form, as it was restricted to having the mean less than the spread). GPSS/H has over 20 built-in functions that can be used. Two distributions that are very commonly used in simulations are the Poisson (exponential) and normal (Gaussian) distributions. These arise in the simulation studies of a great many systems. For example, the interarrival rates of telephone calls are often given by the exponential distribution; the time to travel from point A to point B by truck is normally distributed; the time for a ship to return to a port is often exponential; the time between storms might be exponential; and so on. Both of these functions are well known to engineering students.
