Q1. What are the contributions mentioned in the paper "Measuring and calculating queue length distributions" ?
The authors show: the arriver 's distribution and the completer 's distribution are the same if flow is balanced ; the arriver 's distribution is a renormalization of the outside observer 's distribution if the arrival rate is independent of queue length ( homogeneous ) ; when arrivals are not exactly homogeneous, the error introduced by assuming it is can be quantified.