Data Name: The location of the SAS data set or JMP table that contains the data to be used to estimate a cumulative intensity (rate) function.

X: Name of the column in the data set that specifies the subinterval cutoff points so that the NHPP has an intensity function that is piecewise constant on each subinterval . The subintervals do not necessarily have equal widths. The NHPP is defined on the time interval so that , , and is the number of subintervals. The time units must be consistent with the data. For example, if the interval of interest is from 1:00 p.m. to 5:30 p.m., then the interval is if the data are in hours or if the data are in minutes.

Rates: Name of the column in the data set where each value is the estimated rate of arrivals over each subinterval. Specifically, is the rate of arrivals over the subinterval . The length of the Rates column should be one less than the length of the X column. Furthermore, the units of the rates must be consistent with the rest of the simulation model. For example, if the units used in the model are minutes, then the rates must be specfied in number of arrivals per minute.