Current Issues in Frequency Domain Experimentation
探讨离散事件仿真中频域实验的若干问题，发现结论依赖振荡频率、结果解释与回归分析根本不同，且M/M/1队列不满足时不变线性系统假设，指出该方法尚不成熟。
This paper presents an examination of certain issues in Frequency Domain Experimentation (FDE) for discrete event simulation. Experimental results are presented to demonstrate that (i) conclusions drawn from FDE are dependent on the oscillation frequency and unless frequencies are chosen carefully, misleading results can be obtained; (ii) interpretation of results from frequency domain experiments are fundamentally different from the interpretation of results from regression analysis—specifically, a term found significant by FDE is not to be interpreted as a term able to explain a significant portion of the variation in the response over the experimental region; and (iii) basic assumptions required for FDE, in particular the assumption that input and output processes constitute a time-invariant linear system, do not hold for M/M/1 queues. Other issues discussed are indexing, run length determination, computational effort, and why FDE is not applicable for terminating simulations. It is concluded that further developments are needed before FDE can be used by practitioners.