While modeling stochastic systems it is very important results to be examined using reliable statistics analysis. Estimation methods that can allow user to make statistic conclusions about model from simulation results are needed. These methods are also used while determining relation between simulation time and precision of estimations. To complete the task regeneration method was chosen. This method is successfully used in various practical problems solving. The usage of regeneration method is based on the fact that many stochastic systems renovate in a probability sense. Besides regeneration method easily solves such “tactical” problems like: • How to start simulation? • Which moment to start to gather data at? • What to do with strongly correlated data? Received results are confidential intervals of the queue forming in two and three – channel system characteristics (medium waiting time in queue and maximal length of queue). From these results we can judge about effectiveness of system work and relation between results’ precision and simulation time.