The global simulation clock as the frequency domain experiment index

Frequency domain simulation experiments involve inducing sinusoidal variations in the input process. System sensitivities of the output can be detected in the frequency domain. The selection of an appropriate index for these oscillations is critical in running such experiments. The index for the sinusoidal variations has typically been a discrete index such as customer or part number in queueing and production systems respectively. In this paper, the use of the global simulation clock as the index is discussed.