We model the end-to-end delay of advanced services in the Internet by means
of a heavy-tailed Weibull-Pareto distribution (WPD). First we summarize the
structural properties of the three-parameter WPD class and indicate its relation
to the general Weibull-TX class. Then we present an e ective estimation scheme
to compute the parameters of a WPD distribution by a nite sample. Finally
we show how a WPD distribution can be applied to determine the relevant QoE
performance metric MOS of end-to-end delay dependent services in the Internet.
